diff --git a/app/Console/Commands/ReconcileInvoicesCommand.php b/app/Console/Commands/ReconcileInvoicesCommand.php
new file mode 100644
index 0000000..10d0be5
--- /dev/null
+++ b/app/Console/Commands/ReconcileInvoicesCommand.php
@@ -0,0 +1,113 @@
+<?php
+
+namespace App\Console\Commands;
+
+use App\Models\Transaction\Invoice;
+use App\Services\Invoice\EcpayInvoiceService;
+use Illuminate\Console\Command;
+use Illuminate\Support\Facades\Log;
+
+/**
+ * 電子發票對帳：掃 pending 發票，去綠界 GetIssue 查真實狀態。
+ *
+ * 機台開票回應掉包時 status 會停在 pending（不能當失敗，否則重開會重複）。
+ * 本命令以 RelateNumber 向綠界查詢確認：已開→補登 issued；確認未開→標 failed（待補開）。
+ * 僅處理機台有綠界發票設定者；未設定者一律略過，未開發票的機台零接觸。
+ */
+class ReconcileInvoicesCommand extends Command
+{
+    protected $signature = 'invoices:reconcile {--limit=100 : 單次處理筆數上限} {--max-retry=12 : 單張最多查詢次數}';
+
+    protected $description = '對 pending 電子發票向綠界 GetIssue 查詢並補登/標記狀態';
+
+    public function handle(EcpayInvoiceService $ecpay): int
+    {
+        $limit = (int) $this->option('limit');
+        $maxRetry = (int) $this->option('max-retry');
+
+        $invoices = Invoice::with(['machine.paymentConfig', 'order'])
+            ->where('status', Invoice::STATUS_PENDING)
+            ->whereNotNull('relate_number')
+            ->where('retry_count', '<', $maxRetry)
+            ->orderBy('id')
+            ->limit($limit)
+            ->get();
+
+        if ($invoices->isEmpty()) {
+            $this->info('No pending invoices to reconcile.');
+            return self::SUCCESS;
+        }
+
+        $issued = 0;
+        $failed = 0;
+        $skipped = 0;
+
+        foreach ($invoices as $invoice) {
+            $machine = $invoice->machine;
+            if (!$machine || !$ecpay->configForMachine($machine)) {
+                // 機台無綠界設定 → 略過，不動狀態（不可能誤觸未開發票機台）
+                $skipped++;
+                continue;
+            }
+
+            $result = $ecpay->getIssue($machine, $invoice->relate_number);
+
+            // 連線/解密失敗 → 本輪略過，僅累加重試次數待下輪
+            if ($result === null) {
+                $invoice->update([
+                    'retry_count' => $invoice->retry_count + 1,
+                    'last_checked_at' => now(),
+                ]);
+                $skipped++;
+                continue;
+            }
+
+            $rtnCode = (string) ($result['RtnCode'] ?? '');
+            $invoiceNo = $result['IIS_Number'] ?? ($result['InvoiceNumber'] ?? '');
+
+            if ($rtnCode === '1' && !empty($invoiceNo)) {
+                // 綠界確認已開立 → 補登
+                $invoice->update([
+                    'status' => Invoice::STATUS_ISSUED,
+                    'invoice_no' => $invoiceNo,
+                    'invoice_date' => $this->parseDate($result['IIS_Create_Date'] ?? null),
+                    'random_number' => $result['IIS_Random_Number'] ?? $invoice->random_number,
+                    'rtn_code' => $rtnCode,
+                    'rtn_msg' => $result['RtnMsg'] ?? $invoice->rtn_msg,
+                    'retry_count' => $invoice->retry_count + 1,
+                    'last_checked_at' => now(),
+                ]);
+                $issued++;
+                Log::info('Invoice reconciled as issued', [
+                    'invoice_id' => $invoice->id,
+                    'invoice_no' => $invoiceNo,
+                ]);
+            } else {
+                // 綠界查無此發票 → 確認未開立，標 failed 待補開
+                $invoice->update([
+                    'status' => Invoice::STATUS_FAILED,
+                    'rtn_code' => $rtnCode ?: $invoice->rtn_code,
+                    'rtn_msg' => $result['RtnMsg'] ?? $invoice->rtn_msg,
+                    'retry_count' => $invoice->retry_count + 1,
+                    'last_checked_at' => now(),
+                ]);
+                $failed++;
+            }
+        }
+
+        $this->info("Reconcile done. issued={$issued} failed={$failed} skipped={$skipped}");
+        return self::SUCCESS;
+    }
+
+    private function parseDate(?string $raw): ?string
+    {
+        if (empty($raw)) {
+            return null;
+        }
+        try {
+            return \Carbon\Carbon::parse($raw)->toDateString();
+        } catch (\Throwable $e) {
+            return null;
+        }
+    }
+}
diff --git a/app/Console/Kernel.php b/app/Console/Kernel.php
index 3c78da9..4f0822f 100644
--- a/app/Console/Kernel.php
+++ b/app/Console/Kernel.php
@@ -14,6 +14,8 @@ class Kernel extends ConsoleKernel
     {
         // $schedule->command('inspire')->hourly();
         $schedule->command('ota:process-schedules')->everyMinute();
+        // 電子發票對帳：對 pending 發票去綠界查證（補登 issued / 標 failed 待補開）
+        $schedule->command('invoices:reconcile')->everyFiveMinutes()->withoutOverlapping();
     }
 
     /**
diff --git a/app/Http/Controllers/Admin/SalesController.php b/app/Http/Controllers/Admin/SalesController.php
index bd59d09..a157214 100644
--- a/app/Http/Controllers/Admin/SalesController.php
+++ b/app/Http/Controllers/Admin/SalesController.php
@@ -79,7 +79,8 @@ class SalesController extends Controller
         $end = Carbon::parse($endDate)->endOfMinute();
         
         $ordersQuery->whereBetween('created_at', [$start, $end]);
-        $invoicesQuery->whereBetween('invoice_date', [$start, $end]);
+        // 以 created_at 篩（而非 invoice_date），pending/failed 發票尚無 invoice_date 也能顯示，才看得到缺漏
+        $invoicesQuery->whereBetween('created_at', [$start, $end]);
         $dispenseQuery->whereBetween('machine_time', [$start, $end]);
 
         // 共用過濾器：機台
@@ -127,6 +128,12 @@ class SalesController extends Controller
             if ($status) $ordersQuery->where('status', $status);
         }
 
+        // 發票專用過濾器：狀態（pending/issued/failed/void）
+        if ($tab === 'invoices') {
+            $invoiceStatus = $request->input('invoice_status');
+            if ($invoiceStatus) $invoicesQuery->where('status', $invoiceStatus);
+        }
+
         // 匯出功能攔截
         if ($request->filled('export')) {
             $exportType = $request->input('export');
@@ -1135,4 +1142,131 @@ class SalesController extends Controller
 
         return redirect()->back();
     }
+
+    // ===================== 電子發票對帳/補開/作廢 =====================
+
+    /**
+     * 手動向綠界查詢單張發票真實狀態（GetIssue）。
+     * pending 掉包時用此確認：已開→補登 issued；查無→標 failed 待補開。
+     */
+    public function reconcileInvoice(Invoice $invoice, \App\Services\Invoice\EcpayInvoiceService $ecpay)
+    {
+        // 伺服器端狀態守衛：僅 pending/failed 可查證（防偽造 POST 對終態發票亂操作）
+        if (!in_array($invoice->status, [Invoice::STATUS_PENDING, Invoice::STATUS_FAILED], true)) {
+            return back()->with('error', __('Only pending/failed invoices can be queried'));
+        }
+        $machine = $invoice->machine;
+        if (!$machine || !$ecpay->configForMachine($machine)) {
+            return back()->with('error', __('This machine has no ECPay invoice settings'));
+        }
+        if (empty($invoice->relate_number)) {
+            return back()->with('error', __('Missing RelateNumber, cannot query'));
+        }
+
+        $result = $ecpay->getIssue($machine, $invoice->relate_number);
+        if ($result === null) {
+            $invoice->increment('retry_count');
+            $invoice->update(['last_checked_at' => now()]);
+            return back()->with('error', __('ECPay query failed'));
+        }
+
+        $rtnCode = (string) ($result['RtnCode'] ?? '');
+        $invoiceNo = $result['IIS_Number'] ?? '';
+        if ($rtnCode === '1' && !empty($invoiceNo)) {
+            $invoice->update([
+                'status' => Invoice::STATUS_ISSUED,
+                'invoice_no' => $invoiceNo,
+                'invoice_date' => $this->safeDate($result['IIS_Create_Date'] ?? null),
+                'random_number' => $result['IIS_Random_Number'] ?? $invoice->random_number,
+                'rtn_code' => $rtnCode,
+                'rtn_msg' => $result['RtnMsg'] ?? null,
+                'last_checked_at' => now(),
+            ]);
+            return back()->with('success', __('Confirmed issued: ') . $invoiceNo);
+        }
+
+        $invoice->update([
+            'status' => Invoice::STATUS_FAILED,
+            'rtn_code' => $rtnCode ?: $invoice->rtn_code,
+            'rtn_msg' => $result['RtnMsg'] ?? $invoice->rtn_msg,
+            'last_checked_at' => now(),
+        ]);
+        return back()->with('error', __('ECPay has no such invoice; marked as pending re-issue'));
+    }
+
+    /** 補開（Issue），沿用同一 RelateNumber 冪等。 */
+    public function reissueInvoice(Invoice $invoice, \App\Services\Invoice\EcpayInvoiceService $ecpay)
+    {
+        // 伺服器端狀態守衛：僅 pending/failed 可補開（防把 issued/void 重開造成重複開立）
+        if (!in_array($invoice->status, [Invoice::STATUS_PENDING, Invoice::STATUS_FAILED], true)) {
+            return back()->with('error', __('Only pending/failed invoices can be re-issued'));
+        }
+        $result = $ecpay->reissue($invoice);
+        if ($result === null) {
+            return back()->with('error', __('Re-issue failed (no settings or connection error)'));
+        }
+        $rtnCode = (string) ($result['RtnCode'] ?? '');
+        $invoiceNo = $result['InvoiceNo'] ?? '';
+        if ($rtnCode === '1' && !empty($invoiceNo)) {
+            $invoice->update([
+                'status' => Invoice::STATUS_ISSUED,
+                'invoice_no' => $invoiceNo,
+                'invoice_date' => $this->safeDate($result['InvoiceDate'] ?? null),
+                'random_number' => $result['RandomNumber'] ?? $invoice->random_number,
+                'rtn_code' => $rtnCode,
+                'rtn_msg' => $result['RtnMsg'] ?? null,
+                'last_checked_at' => now(),
+            ]);
+            return back()->with('success', __('Re-issue success: ') . $invoiceNo);
+        }
+        $invoice->update([
+            'rtn_code' => $rtnCode ?: $invoice->rtn_code,
+            'rtn_msg' => $result['RtnMsg'] ?? $invoice->rtn_msg,
+            'last_checked_at' => now(),
+        ]);
+        return back()->with('error', __('Re-issue failed: ') . ($result['RtnMsg'] ?? ''));
+    }
+
+    /** 作廢（Invalid），用於「已開票未出貨」等情況。 */
+    public function voidInvoice(Request $request, Invoice $invoice, \App\Services\Invoice\EcpayInvoiceService $ecpay)
+    {
+        // 伺服器端狀態守衛：僅 issued 可作廢（防把已作廢/未開立的發票再作廢）
+        if ($invoice->status !== Invoice::STATUS_ISSUED) {
+            return back()->with('error', __('Only issued invoices can be voided'));
+        }
+        if (empty($invoice->invoice_no)) {
+            return back()->with('error', __('No invoice issued, cannot void'));
+        }
+        $reason = $request->input('reason', '未出貨作廢');
+        $date = $invoice->invoice_date
+            ? Carbon::parse($invoice->invoice_date)->format('Y-m-d')
+            : '';
+
+        $result = $ecpay->invalid($invoice->machine, $invoice->invoice_no, $date, $reason);
+        if ($result === null) {
+            return back()->with('error', __('Void failed (settings/connection)'));
+        }
+        $rtnCode = (string) ($result['RtnCode'] ?? '');
+        if ($rtnCode === '1') {
+            $invoice->update([
+                'status' => Invoice::STATUS_VOID,
+                'voided_at' => now(),
+                'void_reason' => $reason,
+            ]);
+            return back()->with('success', __('Void success'));
+        }
+        return back()->with('error', __('Void failed: ') . ($result['RtnMsg'] ?? ''));
+    }
+
+    private function safeDate($raw): ?string
+    {
+        if (empty($raw)) {
+            return null;
+        }
+        try {
+            return Carbon::parse($raw)->toDateString();
+        } catch (\Throwable $e) {
+            return null;
+        }
+    }
 }
diff --git a/app/Jobs/Transaction/IssueInvoiceJob.php b/app/Jobs/Transaction/IssueInvoiceJob.php
new file mode 100644
index 0000000..3ebac51
--- /dev/null
+++ b/app/Jobs/Transaction/IssueInvoiceJob.php
@@ -0,0 +1,103 @@
+<?php
+
+namespace App\Jobs\Transaction;
+
+use App\Models\Transaction\Invoice;
+use App\Services\Invoice\EcpayInvoiceService;
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Foundation\Bus\Dispatchable;
+use Illuminate\Queue\InteractsWithQueue;
+use Illuminate\Queue\SerializesModels;
+use Illuminate\Support\Facades\Log;
+
+/**
+ * 後台開立電子發票（取代機台直連綠界）。
+ *
+ * finalize 建立 pending 發票後派發；以 invoice.relate_number 為冪等鍵向綠界開立（Issue）。
+ * 成功→issued、失敗→failed（待人工/排程補開）。連線失敗則 retry，由佇列重試機制接手；
+ * 仍有殘留 pending 者由 invoices:reconcile（GetIssue）做最終查證，避免重複開立。
+ */
+class IssueInvoiceJob implements ShouldQueue
+{
+    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;
+
+    public int $tries = 3;
+    public int $backoff = 30;
+
+    public function __construct(public int $invoiceId)
+    {
+    }
+
+    public function handle(EcpayInvoiceService $ecpay): void
+    {
+        $invoice = Invoice::with(['machine.paymentConfig', 'order.items'])->find($this->invoiceId);
+        if (!$invoice) {
+            return;
+        }
+
+        // 僅處理待開立；已開/失敗/作廢不重複觸發（冪等）
+        if ($invoice->status !== Invoice::STATUS_PENDING) {
+            return;
+        }
+
+        // 機台無綠界設定 → 留 pending（理論上不會發生：無設定機台不會帶 invoice）
+        if (!$invoice->machine || !$ecpay->configForMachine($invoice->machine)) {
+            Log::warning('IssueInvoiceJob: machine has no ECPay config, leave pending', [
+                'invoice_id' => $invoice->id,
+            ]);
+            return;
+        }
+
+        $result = $ecpay->reissue($invoice);
+
+        // 連線/解密失敗 → 丟例外讓佇列重試（不改狀態）
+        if ($result === null) {
+            $invoice->increment('retry_count');
+            $invoice->update(['last_checked_at' => now()]);
+            throw new \RuntimeException('ECPay issue returned null for invoice ' . $invoice->id);
+        }
+
+        $rtnCode = (string) ($result['RtnCode'] ?? '');
+        $invoiceNo = $result['InvoiceNo'] ?? '';
+
+        if ($rtnCode === '1' && !empty($invoiceNo)) {
+            $invoice->update([
+                'status' => Invoice::STATUS_ISSUED,
+                'invoice_no' => $invoiceNo,
+                'invoice_date' => $this->safeDate($result['InvoiceDate'] ?? null),
+                'random_number' => $result['RandomNumber'] ?? $invoice->random_number,
+                'rtn_code' => $rtnCode,
+                'rtn_msg' => $result['RtnMsg'] ?? null,
+                'last_checked_at' => now(),
+            ]);
+            Log::info('Invoice issued by backend', ['invoice_id' => $invoice->id, 'invoice_no' => $invoiceNo]);
+            return;
+        }
+
+        // 綠界明確回失敗 → 標 failed（待補開），不重試
+        $invoice->update([
+            'status' => Invoice::STATUS_FAILED,
+            'rtn_code' => $rtnCode ?: $invoice->rtn_code,
+            'rtn_msg' => $result['RtnMsg'] ?? $invoice->rtn_msg,
+            'last_checked_at' => now(),
+        ]);
+        Log::warning('Invoice issue failed', [
+            'invoice_id' => $invoice->id,
+            'rtn_code' => $rtnCode,
+            'rtn_msg' => $result['RtnMsg'] ?? '',
+        ]);
+    }
+
+    private function safeDate($raw): ?string
+    {
+        if (empty($raw)) {
+            return null;
+        }
+        try {
+            return \Carbon\Carbon::parse($raw)->toDateString();
+        } catch (\Throwable $e) {
+            return null;
+        }
+    }
+}
diff --git a/app/Models/Transaction/Invoice.php b/app/Models/Transaction/Invoice.php
index 2426f9f..e027e9a 100644
--- a/app/Models/Transaction/Invoice.php
+++ b/app/Models/Transaction/Invoice.php
@@ -5,10 +5,14 @@ namespace App\Models\Transaction;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\SoftDeletes;
+use App\Traits\TenantScoped;
 
 class Invoice extends Model
 {
-    use HasFactory, SoftDeletes;
+    // TenantScoped：自動以登入者 company_id 過濾（含 route-model binding 與列表查詢），
+    // 防止跨公司讀取/操作他人發票。console（佇列 Job / reconcile 命令）會自動跳過 scope，
+    // 系統身分仍可跨公司開立/對帳。
+    use HasFactory, SoftDeletes, TenantScoped;
 
     protected $fillable = [
         'company_id',
@@ -16,10 +20,16 @@ class Invoice extends Model
         'machine_id',
         'flow_id',
         'invoice_no',
+        'status',
+        'relate_number',
         'amount',
         'carrier_id',
         'invoice_date',
         'machine_time',
+        'last_checked_at',
+        'retry_count',
+        'voided_at',
+        'void_reason',
         'random_number',
         'love_code',
         'rtn_code',
@@ -28,12 +38,21 @@ class Invoice extends Model
     ];
 
     protected $casts = [
-        'total_amount' => 'decimal:2',
-        'tax_amount' => 'decimal:2',
+        'amount' => 'decimal:2',
+        'invoice_date' => 'date',
         'machine_time' => 'datetime',
+        'last_checked_at' => 'datetime',
+        'voided_at' => 'datetime',
+        'retry_count' => 'integer',
         'metadata' => 'array',
     ];
 
+    // 發票狀態常數
+    public const STATUS_PENDING = 'pending';   // 已送出綠界、尚未確認
+    public const STATUS_ISSUED = 'issued';     // 已開立成功
+    public const STATUS_FAILED = 'failed';     // 綠界回失敗，待補開
+    public const STATUS_VOID = 'void';         // 已作廢
+
     public function order()
     {
         return $this->belongsTo(Order::class);
diff --git a/app/Services/Invoice/EcpayInvoiceService.php b/app/Services/Invoice/EcpayInvoiceService.php
new file mode 100644
index 0000000..369bb0e
--- /dev/null
+++ b/app/Services/Invoice/EcpayInvoiceService.php
@@ -0,0 +1,230 @@
+<?php
+
+namespace App\Services\Invoice;
+
+use App\Models\Machine\Machine;
+use App\Models\Transaction\Invoice;
+use Illuminate\Support\Facades\Http;
+use Illuminate\Support\Facades\Log;
+
+/**
+ * 綠界電子發票 B2C API 服務（後台對帳/補開/作廢用）。
+ *
+ * 機台端在出貨時已「直連綠界」開立並把結果隨 finalize 上報；本服務負責後台側：
+ *  - GetIssue：對 pending 發票以 RelateNumber 去綠界查詢真實狀態（處理掉包/未知，避免重複開立）
+ *  - Issue   ：對確認未開立者補開（沿用同一 RelateNumber，冪等）
+ *  - Invalid ：對「已開票未出貨」等情況作廢
+ *
+ * 金鑰來源：機台關聯的金流配置 payment_configs.settings.ecpay_invoice（store_id/hash_key/hash_iv/email），
+ * 與機台 B014 下發同源。未設定者一律略過（回 null），確保未開發票的機台零接觸。
+ */
+class EcpayInvoiceService
+{
+    private const REVISION = '3.2.9';
+
+    private function baseUrl(): string
+    {
+        // fail-safe：一律預設「測試站」，只有明確設定 ECPAY_INVOICE_BASE_URL 才會打正式站。
+        // 不可用 APP_ENV 判斷——demo 站的 APP_ENV 也是 production，靠它會誤打正式綠界開出真發票。
+        // 正式環境必須在 .env 設 ECPAY_INVOICE_BASE_URL=https://einvoice.ecpay.com.tw；
+        // 若漏設，最壞情況是正式環境開到測試站（無真實發票、可被察覺），不會誤開真發票。
+        $configured = config('services.ecpay_invoice.base_url');
+        if (!empty($configured)) {
+            return rtrim($configured, '/');
+        }
+        return 'https://einvoice-stage.ecpay.com.tw';
+    }
+
+    /** 取得機台綠界發票設定；未設定回 null。 */
+    public function configForMachine(Machine $machine): ?array
+    {
+        $settings = $machine->paymentConfig->settings ?? [];
+        $merchantId = data_get($settings, 'ecpay_invoice.store_id');
+        $hashKey = data_get($settings, 'ecpay_invoice.hash_key');
+        $hashIv = data_get($settings, 'ecpay_invoice.hash_iv');
+
+        if (empty($merchantId) || empty($hashKey) || empty($hashIv)) {
+            return null;
+        }
+
+        return [
+            'merchant_id' => $merchantId,
+            'hash_key' => $hashKey,
+            'hash_iv' => $hashIv,
+            'email' => data_get($settings, 'ecpay_invoice.email', ''),
+        ];
+    }
+
+    private function encrypt(array $data, string $key, string $iv): string
+    {
+        $json = json_encode($data, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
+        return base64_encode(openssl_encrypt(urlencode($json), 'AES-128-CBC', $key, OPENSSL_RAW_DATA, $iv));
+    }
+
+    private function decrypt(?string $data, string $key, string $iv): array
+    {
+        if (empty($data)) {
+            return [];
+        }
+        $decrypted = openssl_decrypt(base64_decode($data), 'AES-128-CBC', $key, OPENSSL_RAW_DATA, $iv);
+        if ($decrypted === false) {
+            return [];
+        }
+        return json_decode(urldecode($decrypted), true) ?: [];
+    }
+
+    /** 共用 POST：包 RqHeader + AES 加密 Data，回傳 decode 後的 Data 陣列（失敗回 null）。 */
+    private function post(string $endpoint, array $cfg, array $payloadData): ?array
+    {
+        $body = [
+            'MerchantID' => $cfg['merchant_id'],
+            'RqHeader' => ['Timestamp' => time(), 'Revision' => self::REVISION],
+            'Data' => $this->encrypt($payloadData, $cfg['hash_key'], $cfg['hash_iv']),
+        ];
+
+        try {
+            $resp = Http::timeout(15)->asJson()->post($this->baseUrl() . $endpoint, $body);
+            $json = $resp->json();
+            if (!is_array($json) || !isset($json['Data'])) {
+                Log::warning('ECPay invoice response missing Data', ['endpoint' => $endpoint, 'resp' => $json]);
+                return null;
+            }
+            return $this->decrypt($json['Data'], $cfg['hash_key'], $cfg['hash_iv']);
+        } catch (\Throwable $e) {
+            Log::error('ECPay invoice request failed: ' . $e->getMessage(), ['endpoint' => $endpoint]);
+            return null;
+        }
+    }
+
+    /**
+     * 查詢發票（GetIssue），以 RelateNumber 查。
+     * 回傳 decode 後陣列（含 RtnCode/IIS_Number 等）或 null（金鑰缺/連線失敗）。
+     */
+    public function getIssue(Machine $machine, string $relateNumber): ?array
+    {
+        $cfg = $this->configForMachine($machine);
+        if (!$cfg) {
+            return null;
+        }
+        return $this->post('/B2CInvoice/GetIssue', $cfg, [
+            'MerchantID' => $cfg['merchant_id'],
+            'RelateNumber' => $relateNumber,
+        ]);
+    }
+
+    /** 補開：以完整開立內容呼叫 Issue。回傳 decode 後陣列或 null。 */
+    public function issue(Machine $machine, array $invoicePayload): ?array
+    {
+        $cfg = $this->configForMachine($machine);
+        if (!$cfg) {
+            return null;
+        }
+        $invoicePayload['MerchantID'] = $cfg['merchant_id'];
+        return $this->post('/B2CInvoice/Issue', $cfg, $invoicePayload);
+    }
+
+    /** 作廢（Invalid）。 */
+    public function invalid(Machine $machine, string $invoiceNo, string $invoiceDate, string $reason = '作廢'): ?array
+    {
+        $cfg = $this->configForMachine($machine);
+        if (!$cfg) {
+            return null;
+        }
+        return $this->post('/B2CInvoice/Invalid', $cfg, [
+            'MerchantID' => $cfg['merchant_id'],
+            'InvoiceNo' => $invoiceNo,
+            'InvoiceDate' => $invoiceDate,
+            'Reason' => mb_substr($reason ?: '作廢', 0, 20),
+        ]);
+    }
+
+    /**
+     * 由既有 Invoice（+ 關聯 Order/items）重建開立內容並補開。
+     * 沿用 invoice.relate_number 當 RelateNumber（冪等，不會重複開立）。
+     */
+    public function reissue(Invoice $invoice): ?array
+    {
+        $machine = $invoice->machine;
+        $cfg = $this->configForMachine($machine);
+        if (!$cfg || empty($invoice->relate_number)) {
+            return null;
+        }
+
+        $order = $invoice->order;
+        $metadata = $invoice->metadata ?? [];
+        $businessTaxId = $metadata['business_tax_id'] ?? '';
+        $carrier = $invoice->carrier_id ?? '';
+        $loveCode = $invoice->love_code ?? '';
+
+        // 載具類型判定（對齊機台端邏輯）
+        $carrierType = '';
+        $donation = '0';
+        if (strlen($loveCode) > 2) {
+            $donation = '1';
+            $carrierType = '';
+        } elseif (strlen($carrier) === 8) {
+            $carrierType = '3'; // 手機條碼
+        } elseif (strlen($carrier) === 16) {
+            $carrierType = '2'; // 自然人憑證
+        } elseif (empty($businessTaxId)) {
+            $carrierType = '1'; // 綠界會員載具
+        }
+
+        // 品項
+        $items = [];
+        $seq = 1;
+        $orderItems = $order ? $order->items : collect();
+        foreach ($orderItems as $oi) {
+            $items[] = [
+                'ItemSeq' => $seq++,
+                'ItemName' => $oi->product_name ?: ('商品' . $oi->product_id),
+                'ItemCount' => (int) $oi->quantity,
+                'ItemWord' => '個',
+                'ItemPrice' => (int) round($oi->price),
+                'ItemTaxType' => '1',
+                'ItemAmount' => (int) round($oi->subtotal ?: ($oi->price * $oi->quantity)),
+                'ItemRemark' => '',
+            ];
+        }
+        if (empty($items)) {
+            // 無明細時以單列總額補上，確保發票可開立
+            $items[] = [
+                'ItemSeq' => 1,
+                'ItemName' => '商品',
+                'ItemCount' => 1,
+                'ItemWord' => '式',
+                'ItemPrice' => (int) round($invoice->amount),
+                'ItemTaxType' => '1',
+                'ItemAmount' => (int) round($invoice->amount),
+                'ItemRemark' => '',
+            ];
+        }
+
+        $payload = [
+            'RelateNumber' => $invoice->relate_number,
+            'CustomerID' => $machine->serial_no,
+            'Print' => empty($businessTaxId) ? '0' : '1',
+            'CustomerIdentifier' => $businessTaxId,
+            'CustomerName' => $businessTaxId,
+            'CustomerAddr' => $businessTaxId,
+            'CustomerPhone' => '',
+            'CustomerEmail' => $donation === '1'
+                ? ($invoice->relate_number . substr($cfg['email'], strpos($cfg['email'], '@') ?: 0))
+                : ($cfg['email'] ?: ''),
+            'ClearanceMark' => '',
+            'Donation' => $donation,
+            'LoveCode' => $donation === '1' ? $loveCode : '',
+            'CarrierType' => $carrierType,
+            'CarrierNum' => ($carrierType === '2' || $carrierType === '3') ? str_replace('+', ' ', $carrier) : '',
+            'TaxType' => '1',
+            'SpecialTaxType' => 0,
+            'SalesAmount' => (int) round($invoice->amount),
+            'InvoiceRemark' => '發票備註:無',
+            'InvType' => '07',
+            'vat' => '1',
+            'Items' => $items,
+        ];
+
+        return $this->issue($machine, $payload);
+    }
+}
diff --git a/app/Services/Transaction/TransactionService.php b/app/Services/Transaction/TransactionService.php
index 637fd57..cb7d0e3 100644
--- a/app/Services/Transaction/TransactionService.php
+++ b/app/Services/Transaction/TransactionService.php
@@ -114,11 +114,11 @@ class TransactionService
     public function recordInvoice(array $data): Invoice
     {
         return DB::transaction(function () use ($data) {
-            $machine = Machine::where('serial_no', $data['serial_no'])->firstOrFail();
+            $machine = Machine::withoutGlobalScopes()->where('serial_no', $data['serial_no'])->firstOrFail();
 
             $order = null;
             if (!empty($data['flow_id'])) {
-                $order = Order::where('flow_id', $data['flow_id'])->first();
+                $order = Order::withoutGlobalScopes()->where('flow_id', $data['flow_id'])->first();
             }
 
             // 處理額外的發票資訊 (business_tax_id, carrier_type)
@@ -128,22 +128,65 @@ class TransactionService
             if (isset($data['carrier_type']))
                 $metadata['carrier_type'] = $data['carrier_type'];
 
-            return Invoice::create([
+            $invoiceNo = $data['invoice_no'] ?? null;
+            $rtnCode = $data['rtn_code'] ?? null;
+
+            // 狀態：優先採用 App 已判定的 status（新 finalize 流程一定帶 status=pending）；否則才推導。
+            // 此推導分支目前僅 MQTT 'invoice' 指令(ProcessInvoice)會走，App 暫未使用，屬防禦性。
+            // 重點：有發票號就代表已開立，除非「明確」收到失敗碼才算 failed
+            //（部分上報格式只帶 invoice_no、不帶 rtn_code，不可因缺 rtn_code 就誤判失敗）。
+            // 綠界 RtnCode == "1" 為成功；其餘非空值才視為明確失敗。
+            $status = $data['status'] ?? null;
+            if (empty($status)) {
+                $explicitFailure = !empty($rtnCode) && (string) $rtnCode !== '1';
+                if (!empty($invoiceNo)) {
+                    $status = $explicitFailure ? 'failed' : 'issued';
+                } else {
+                    // 無發票號：明確失敗→failed；否則待開立/待查證→pending
+                    $status = $explicitFailure ? 'failed' : 'pending';
+                }
+            }
+
+            // RelateNumber 冪等鍵：App 未帶時由後台以 serial + flow_id 推導（綠界上限 30 字）
+            $relateNumber = $data['relate_number'] ?? null;
+            if (empty($relateNumber) && !empty($data['flow_id'])) {
+                $relateNumber = substr($machine->serial_no . $data['flow_id'], 0, 30);
+            }
+
+            $attributes = [
                 'company_id' => $machine->company_id,
                 'order_id' => $order?->id ?? ($data['order_id'] ?? null),
                 'machine_id' => $machine->id,
-                'flow_id' => $data['flow_id'] ?? null,
-                'invoice_no' => $data['invoice_no'] ?? null,
+                'invoice_no' => $invoiceNo,
+                'status' => $status,
+                'relate_number' => $relateNumber,
                 'amount' => $data['amount'] ?? 0,
                 'carrier_id' => $data['carrier_id'] ?? null,
                 'invoice_date' => $data['invoice_date'] ?? null,
                 'machine_time' => $data['machine_time'] ?? null,
                 'random_number' => $data['random_number'] ?? ($data['random_no'] ?? null),
                 'love_code' => $data['love_code'] ?? null,
-                'rtn_code' => $data['rtn_code'] ?? null,
+                'rtn_code' => $rtnCode,
                 'rtn_msg' => $data['rtn_msg'] ?? null,
                 'metadata' => $metadata,
-            ]);
+            ];
+
+            // 去重：同一 flow_id（一張訂單一張發票）以 updateOrCreate 收斂，
+            // 避免 finalize 重送 / 補開回寫產生重複發票列。
+            if (!empty($data['flow_id'])) {
+                // 終態守衛（防禦縱深）：已開立/已作廢的發票為終態，不得被後續寫入覆蓋，
+                // 避免任何重送（含 ProcessInvoice/MQTT invoice 指令）把 issued 打回 pending、清掉發票號。
+                $existing = Invoice::withoutGlobalScopes()->where('flow_id', $data['flow_id'])->first();
+                if ($existing && in_array($existing->status, [Invoice::STATUS_ISSUED, Invoice::STATUS_VOID], true)) {
+                    return $existing;
+                }
+                return Invoice::withoutGlobalScopes()->updateOrCreate(
+                    ['flow_id' => $data['flow_id']],
+                    $attributes
+                );
+            }
+
+            return Invoice::create(array_merge($attributes, ['flow_id' => null]));
         });
     }
 
@@ -259,13 +302,21 @@ class TransactionService
             }
             $order = $this->processTransaction($orderData);
 
-            // 2. Record Invoice (B601) - Optional
+            // 2. Record Invoice — 後台開立版：finalize 帶 invoice 輸入(status=pending)時建 pending 發票，
+            //    commit 後派 IssueInvoiceJob 去綠界開立（不在交易內等 ECPay，避免長交易）。
             if (!empty($data['invoice'])) {
                 $invoiceData = $data['invoice'];
                 $invoiceData['serial_no'] = $serialNo;
                 $invoiceData['flow_id'] = $order->flow_id;
                 $invoiceData['order_id'] = $order->id;
-                $this->recordInvoice($invoiceData);
+                $invoice = $this->recordInvoice($invoiceData);
+
+                // 待開立 → commit 後非同步開立（已開/失敗則不重複觸發）
+                if ($invoice->status === Invoice::STATUS_PENDING) {
+                    DB::afterCommit(function () use ($invoice) {
+                        \App\Jobs\Transaction\IssueInvoiceJob::dispatch($invoice->id);
+                    });
+                }
             }
 
             // 3. Record Dispense Results (B602) - Optional/Multiple
diff --git a/config/services.php b/config/services.php
index 0ace530..c7c05f7 100644
--- a/config/services.php
+++ b/config/services.php
@@ -31,4 +31,11 @@ return [
         'region' => env('AWS_DEFAULT_REGION', 'us-east-1'),
     ],
 
+    // 綠界電子發票 B2C API（後台對帳/補開/作廢）。金鑰仍取自各機台 payment_configs.ecpay_invoice；
+    // 此處僅控制 API 網域。留空（未設 env）時由 EcpayInvoiceService 依環境 fail-safe：
+    // 正式環境才用 https://einvoice.ecpay.com.tw，其餘走 https://einvoice-stage.ecpay.com.tw。
+    'ecpay_invoice' => [
+        'base_url' => env('ECPAY_INVOICE_BASE_URL'),
+    ],
+
 ];
diff --git a/database/migrations/2026_06_15_120000_add_status_and_reconciliation_to_invoices_table.php b/database/migrations/2026_06_15_120000_add_status_and_reconciliation_to_invoices_table.php
new file mode 100644
index 0000000..0082d69
--- /dev/null
+++ b/database/migrations/2026_06_15_120000_add_status_and_reconciliation_to_invoices_table.php
@@ -0,0 +1,57 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Support\Facades\DB;
+
+/**
+ * 電子發票對帳/補開所需欄位。
+ *
+ * 背景：機台改走 MQTT finalize 後，發票結果（含 pending）隨交易一起上報；
+ * 後台需要狀態機與冪等鍵，才能對 pending 去綠界查詢(GetIssue)、對 failed 補開(Issue)、
+ * 對「已開票未出貨」作廢(Invalid)。全部欄位 nullable / 有預設，對既有資料與未開發票的機台零影響。
+ */
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('invoices', function (Blueprint $table) {
+            // 開立狀態：pending（已送出未回應）/ issued（已開）/ failed（綠界回失敗）/ void（已作廢）
+            $table->string('status')->default('issued')->index()->after('invoice_no')
+                ->comment('發票狀態: pending/issued/failed/void');
+            // 綠界 RelateNumber（冪等鍵, = machineID + flow_id），查詢/補開用
+            $table->string('relate_number')->nullable()->index()->after('status')
+                ->comment('綠界 RelateNumber 冪等鍵');
+            // 對帳排程：上次去綠界查詢的時間與已重試次數
+            $table->timestamp('last_checked_at')->nullable()->after('machine_time')
+                ->comment('上次向綠界查詢/補開的時間');
+            $table->unsignedInteger('retry_count')->default(0)->after('last_checked_at')
+                ->comment('查詢/補開重試次數');
+            // 作廢稽核
+            $table->timestamp('voided_at')->nullable()->after('retry_count')
+                ->comment('作廢時間');
+            $table->string('void_reason')->nullable()->after('voided_at')
+                ->comment('作廢原因');
+        });
+
+        // 既有資料回填：有發票號→issued，否則→failed（未開發票的機台沒有任何列，等同 no-op）
+        DB::table('invoices')
+            ->whereNull('invoice_no')->orWhere('invoice_no', '')
+            ->update(['status' => 'failed']);
+    }
+
+    public function down(): void
+    {
+        Schema::table('invoices', function (Blueprint $table) {
+            $table->dropColumn([
+                'status',
+                'relate_number',
+                'last_checked_at',
+                'retry_count',
+                'voided_at',
+                'void_reason',
+            ]);
+        });
+    }
+};
diff --git a/lang/zh_TW.json b/lang/zh_TW.json
index 10c32a2..58a4776 100644
--- a/lang/zh_TW.json
+++ b/lang/zh_TW.json
@@ -961,6 +961,28 @@
     "LINE Official Pay": "Line官方支付",
     "LINE Pay": "LINE Pay",
     "LINE Pay (Official)": "LINE Pay(官方)",
+    "Pending": "待開立",
+    "Issued": "已開立",
+    "Query": "查詢",
+    "Query ECPay": "向綠界查詢",
+    "Re-issue": "補開",
+    "Re-issue this invoice?": "確定要補開這張發票嗎？",
+    "Void this invoice?": "確定要作廢這張發票嗎？",
+    "This machine has no ECPay invoice settings": "此機台未設定綠界電子發票",
+    "Missing RelateNumber, cannot query": "缺少 RelateNumber，無法查詢",
+    "ECPay query failed": "綠界查詢失敗",
+    "Confirmed issued: ": "已確認開立：",
+    "ECPay has no such invoice; marked as pending re-issue": "綠界查無此發票，已標記為待補開",
+    "Re-issue failed (no settings or connection error)": "補開失敗（未設定或連線錯誤）",
+    "Re-issue success: ": "補開成功：",
+    "Re-issue failed: ": "補開失敗：",
+    "No invoice issued, cannot void": "尚未開立發票，無法作廢",
+    "Void failed (settings/connection)": "作廢失敗（設定或連線）",
+    "Void success": "作廢成功",
+    "Void failed: ": "作廢失敗：",
+    "Only pending/failed invoices can be queried": "僅待開立/失敗的發票可查詢",
+    "Only pending/failed invoices can be re-issued": "僅待開立/失敗的發票可補開",
+    "Only issued invoices can be voided": "僅已開立的發票可作廢",
     "LINE Pay Direct": "LINE Pay 官方直連",
     "LINE Pay Direct Settings Description": "LINE Pay 官方直連設定",
     "LINE-ChannelId": "LINE-ChannelId",
diff --git a/resources/views/admin/sales/partials/tab-invoices.blade.php b/resources/views/admin/sales/partials/tab-invoices.blade.php
index 4fb7281..f84cdd5 100644
--- a/resources/views/admin/sales/partials/tab-invoices.blade.php
+++ b/resources/views/admin/sales/partials/tab-invoices.blade.php
@@ -217,18 +217,15 @@
                 </td>
                 <td class="px-6 py-6 whitespace-nowrap">
                     @php
-                    // 簡單判斷：如果有發票號碼且 rtn_code 為空或 0/1 則視為有效
-                    $status = 'valid';
-                    if (empty($invoice->invoice_no)) $status = 'failed';
-                    if ($invoice->rtn_code === 'void') $status = 'void';
-
+                    // 以發票狀態機顯示（pending/issued/failed/void）；舊資料無 status 時以發票號回推
+                    $st = $invoice->status ?: (empty($invoice->invoice_no) ? 'failed' : 'issued');
                     $statusMap = [
-                    'valid' => ['label' => __('Valid'), 'color' => 'emerald'],
-                    'void' => ['label' => __('Void'), 'color' => 'rose'],
+                    'pending' => ['label' => __('Pending'), 'color' => 'amber'],
+                    'issued' => ['label' => __('Issued'), 'color' => 'emerald'],
                     'failed' => ['label' => __('Failed'), 'color' => 'rose'],
-                    'refunded' => ['label' => __('Refunded'), 'color' => 'slate'],
+                    'void' => ['label' => __('Void'), 'color' => 'slate'],
                     ];
-                    $s = $statusMap[$status] ?? ['label' => $status, 'color' => 'slate'];
+                    $s = $statusMap[$st] ?? ['label' => $st, 'color' => 'slate'];
                     @endphp
                     <x-status-badge :color="$s['color']" :label="$s['label']" size="xs" />
                 </td>
@@ -238,16 +235,45 @@
                         {{ $invoice->order->order_no ?? '---' }}
                     </span>
                 </td>
-                <td class="px-6 py-6 text-right">
-                    <button
-                        class="p-2.5 rounded-xl text-slate-400 hover:text-cyan-500 hover:bg-cyan-500/5 dark:hover:bg-cyan-500/10 border border-transparent hover:border-cyan-500/20 transition-all">
-                        <svg class="w-4 h-4 stroke-[2.5]" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-                            <path stroke-linecap="round" stroke-linejoin="round"
-                                d="M2.036 12.322a1.012 1.012 0 0 1 0-.639C3.423 7.51 7.36 4.5 12 4.5c4.638 0 8.573 3.007 9.963 7.178.07.207.07.431 0 .639C20.577 16.49 16.64 19.5 12 19.5c-4.638 0-8.573-3.007-9.963-7.178Z" />
-                            <path stroke-linecap="round" stroke-linejoin="round"
-                                d="M15 12a3 3 0 1 1-6 0 3 3 0 0 1 6 0Z" />
-                        </svg>
-                    </button>
+                <td class="px-6 py-6 text-right" @click.stop>
+                    <div class="flex items-center justify-end gap-1.5">
+                        @if(in_array($st, ['pending', 'failed']))
+                        <form method="POST" action="{{ route('admin.sales.invoices.reconcile', $invoice) }}">
+                            @csrf
+                            <button type="submit" title="{{ __('Query ECPay') }}"
+                                class="px-2.5 py-1.5 rounded-lg text-[11px] font-bold text-amber-600 dark:text-amber-400 bg-amber-500/5 hover:bg-amber-500/10 border border-amber-500/20 transition-all">
+                                {{ __('Query') }}
+                            </button>
+                        </form>
+                        <form method="POST" action="{{ route('admin.sales.invoices.reissue', $invoice) }}"
+                            onsubmit="return confirm('{{ __('Re-issue this invoice?') }}')">
+                            @csrf
+                            <button type="submit" title="{{ __('Re-issue') }}"
+                                class="px-2.5 py-1.5 rounded-lg text-[11px] font-bold text-cyan-600 dark:text-cyan-400 bg-cyan-500/5 hover:bg-cyan-500/10 border border-cyan-500/20 transition-all">
+                                {{ __('Re-issue') }}
+                            </button>
+                        </form>
+                        @endif
+                        @if($st === 'issued')
+                        <form method="POST" action="{{ route('admin.sales.invoices.void', $invoice) }}"
+                            onsubmit="return confirm('{{ __('Void this invoice?') }}')">
+                            @csrf
+                            <button type="submit" title="{{ __('Void') }}"
+                                class="px-2.5 py-1.5 rounded-lg text-[11px] font-bold text-rose-600 dark:text-rose-400 bg-rose-500/5 hover:bg-rose-500/10 border border-rose-500/20 transition-all">
+                                {{ __('Void') }}
+                            </button>
+                        </form>
+                        @endif
+                        <button @click="openDetail({{ $invoice->order_id }})"
+                            class="p-2 rounded-xl text-slate-400 hover:text-cyan-500 hover:bg-cyan-500/5 dark:hover:bg-cyan-500/10 border border-transparent hover:border-cyan-500/20 transition-all">
+                            <svg class="w-4 h-4 stroke-[2.5]" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                                <path stroke-linecap="round" stroke-linejoin="round"
+                                    d="M2.036 12.322a1.012 1.012 0 0 1 0-.639C3.423 7.51 7.36 4.5 12 4.5c4.638 0 8.573 3.007 9.963 7.178.07.207.07.431 0 .639C20.577 16.49 16.64 19.5 12 19.5c-4.638 0-8.573-3.007-9.963-7.178Z" />
+                                <path stroke-linecap="round" stroke-linejoin="round"
+                                    d="M15 12a3 3 0 1 1-6 0 3 3 0 0 1 6 0Z" />
+                            </svg>
+                        </button>
+                    </div>
                 </td>
             </tr>
             @empty
@@ -267,16 +293,14 @@
     <div
         class="luxury-card p-6 rounded-[2rem] border border-slate-100 dark:border-slate-800 bg-white/50 dark:bg-slate-900/50 transition-all duration-300 group">
         @php
-        $status = 'valid';
-        if (empty($invoice->invoice_no)) $status = 'failed';
-        if ($invoice->rtn_code === 'void') $status = 'void';
+        $st = $invoice->status ?: (empty($invoice->invoice_no) ? 'failed' : 'issued');
         $statusMap = [
-        'valid' => ['label' => __('Valid'), 'color' => 'emerald'],
-        'void' => ['label' => __('Void'), 'color' => 'rose'],
+        'pending' => ['label' => __('Pending'), 'color' => 'amber'],
+        'issued' => ['label' => __('Issued'), 'color' => 'emerald'],
         'failed' => ['label' => __('Failed'), 'color' => 'rose'],
-        'refunded' => ['label' => __('Refunded'), 'color' => 'slate'],
+        'void' => ['label' => __('Void'), 'color' => 'slate'],
         ];
-        $s = $statusMap[$status] ?? ['label' => $status, 'color' => 'slate'];
+        $s = $statusMap[$st] ?? ['label' => $st, 'color' => 'slate'];
         @endphp
 
         {{-- Card Header --}}
@@ -344,7 +368,7 @@
         </div>
 
         {{-- Action Buttons --}}
-        <div class="flex items-center gap-3">
+        <div class="flex flex-col gap-3">
             <button @click="openDetail({{ $invoice->order_id }})"
                 class="flex-1 flex items-center justify-center gap-2 py-3 rounded-xl bg-slate-50 dark:bg-slate-800 text-slate-600 dark:text-slate-300 font-black text-xs uppercase tracking-widest border border-slate-100 dark:border-slate-800 hover:text-cyan-500 hover:bg-cyan-500/5 transition-all duration-300">
                 <svg class="w-4 h-4 stroke-[2.5]" fill="none" stroke="currentColor" viewBox="0 0 24 24">
@@ -354,6 +378,35 @@
                 </svg>
                 {{ __('View Details') }}
             </button>
+            @if(in_array($st, ['pending', 'failed']))
+            <div class="flex items-center gap-2">
+                <form method="POST" action="{{ route('admin.sales.invoices.reconcile', $invoice) }}" class="flex-1">
+                    @csrf
+                    <button type="submit"
+                        class="w-full py-2.5 rounded-xl bg-amber-500/10 text-amber-600 dark:text-amber-400 font-black text-xs uppercase tracking-widest border border-amber-500/20">
+                        {{ __('Query') }}
+                    </button>
+                </form>
+                <form method="POST" action="{{ route('admin.sales.invoices.reissue', $invoice) }}" class="flex-1"
+                    onsubmit="return confirm('{{ __('Re-issue this invoice?') }}')">
+                    @csrf
+                    <button type="submit"
+                        class="w-full py-2.5 rounded-xl bg-cyan-500/10 text-cyan-600 dark:text-cyan-400 font-black text-xs uppercase tracking-widest border border-cyan-500/20">
+                        {{ __('Re-issue') }}
+                    </button>
+                </form>
+            </div>
+            @endif
+            @if($st === 'issued')
+            <form method="POST" action="{{ route('admin.sales.invoices.void', $invoice) }}"
+                onsubmit="return confirm('{{ __('Void this invoice?') }}')">
+                @csrf
+                <button type="submit"
+                    class="w-full py-2.5 rounded-xl bg-rose-500/10 text-rose-600 dark:text-rose-400 font-black text-xs uppercase tracking-widest border border-rose-500/20">
+                    {{ __('Void') }}
+                </button>
+            </form>
+            @endif
         </div>
     </div>
     @empty
diff --git a/routes/web.php b/routes/web.php
index e152a28..8b2cd2b 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -141,7 +141,12 @@ Route::middleware(['auth', 'auth.session', 'verified', 'tenant.access'])->prefix
     // 6. 銷售管理
     Route::prefix('sales')->name('sales.')->group(function () {
         Route::get('/', [App\Http\Controllers\Admin\SalesController::class, 'index'])->name('index');
-        
+
+        // 電子發票對帳/補開/作廢
+        Route::post('/invoices/{invoice}/reconcile', [App\Http\Controllers\Admin\SalesController::class, 'reconcileInvoice'])->name('invoices.reconcile');
+        Route::post('/invoices/{invoice}/reissue', [App\Http\Controllers\Admin\SalesController::class, 'reissueInvoice'])->name('invoices.reissue');
+        Route::post('/invoices/{invoice}/void', [App\Http\Controllers\Admin\SalesController::class, 'voidInvoice'])->name('invoices.void');
+
         // 取貨碼
         Route::get('/pickup-codes', [App\Http\Controllers\Admin\SalesController::class, 'pickupCodes'])->name('pickup-codes');
         Route::post('/pickup-codes', [App\Http\Controllers\Admin\SalesController::class, 'storePickupCode'])->name('pickup-codes.store');