diff --git a/app/Domains/Integration/Services/TelepagosWebhookService.php b/app/Domains/Integration/Services/TelepagosWebhookService.php
index 421af1c..ac0a2b6 100644
--- a/app/Domains/Integration/Services/TelepagosWebhookService.php
+++ b/app/Domains/Integration/Services/TelepagosWebhookService.php
@@ -54,7 +54,7 @@ class TelepagosWebhookService
                 $dni = substr($cuit, 2, -1);
 
                 $compra = Purchase::where('tenant_codigo', $tenantCodigo)
-                    ->whereRaw("REPLACE(dni, '.', '') = ?", [$dni])
+                    ->where('payer_dni', $dni)
                     ->whereIn('status', [Purchase::STATUS_CREATED, Purchase::STATUS_PENDING_PAYMENT])
                     ->where('payment_method', 'transfer')
                     ->where('total', $amount)
diff --git a/app/Domains/Purchase/Controllers/PurchaseController.php b/app/Domains/Purchase/Controllers/PurchaseController.php
index 499536e..1557dcc 100644
--- a/app/Domains/Purchase/Controllers/PurchaseController.php
+++ b/app/Domains/Purchase/Controllers/PurchaseController.php
@@ -68,10 +68,16 @@ class PurchaseController extends Controller
         $method = $request->validated('method');
         $totalAmount = $compra->calculateCurrentTotalAmount();
 
-        $compra->update([
+        $purchaseUpdate = [
             'payment_method' => $method,
             'total' => $totalAmount,
-        ]);
+        ];
+
+        if ($method === 'transfer') {
+            $purchaseUpdate['payer_dni'] = preg_replace('/\D+/', '', (string) $request->validated('payer_dni'));
+        }
+
+        $compra->update($purchaseUpdate);
 
         if ($method === 'transfer') {
             $telepagosService = new TelepagosIntegrationService;
diff --git a/app/Domains/Purchase/Models/Purchase.php b/app/Domains/Purchase/Models/Purchase.php
index 2d39e7a..c1cd132 100644
--- a/app/Domains/Purchase/Models/Purchase.php
+++ b/app/Domains/Purchase/Models/Purchase.php
@@ -20,6 +20,7 @@ use Illuminate\Database\Eloquent\Relations\HasOne;
     'payment_method',
     'total',
     'dni',
+    'payer_dni',
     'telefono',
     'nombre_apellido',
     'email',
diff --git a/app/Domains/Purchase/Requests/PaymentIntentRequest.php b/app/Domains/Purchase/Requests/PaymentIntentRequest.php
index cfb7b65..095f4b9 100644
--- a/app/Domains/Purchase/Requests/PaymentIntentRequest.php
+++ b/app/Domains/Purchase/Requests/PaymentIntentRequest.php
@@ -19,6 +19,11 @@ class PaymentIntentRequest extends FormRequest
     {
         return [
             'method' => ['required', 'string', Rule::in(['qr', 'transfer'])],
+            'payer_dni' => [
+                Rule::requiredIf(fn (): bool => $this->input('method') === 'transfer'),
+                'string',
+                'regex:/^\d{7,8}$/',
+            ],
         ];
     }
 }
diff --git a/app/Domains/Purchase/Resources/PurchaseResource.php b/app/Domains/Purchase/Resources/PurchaseResource.php
index b955849..8fdc774 100644
--- a/app/Domains/Purchase/Resources/PurchaseResource.php
+++ b/app/Domains/Purchase/Resources/PurchaseResource.php
@@ -44,6 +44,7 @@ class PurchaseResource extends JsonResource
             'status' => $this->status,
             'payment_method' => $this->payment_method,
             'dni' => $this->dni,
+            'payer_dni' => $this->payer_dni,
             'telefono' => $this->telefono,
             'nombre_apellido' => $this->nombre_apellido,
             'email' => $this->email,
diff --git a/database/migrations/2026_07_12_000000_add_payer_dni_to_compras_table.php b/database/migrations/2026_07_12_000000_add_payer_dni_to_compras_table.php
new file mode 100644
index 0000000..298b385
--- /dev/null
+++ b/database/migrations/2026_07_12_000000_add_payer_dni_to_compras_table.php
@@ -0,0 +1,22 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('compras', function (Blueprint $table) {
+            $table->string('payer_dni', 8)->nullable()->after('dni');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('compras', function (Blueprint $table) {
+            $table->dropColumn('payer_dni');
+        });
+    }
+};
diff --git a/tests/Feature/Integration/TelepagosWebhookTest.php b/tests/Feature/Integration/TelepagosWebhookTest.php
index db8ec16..99eafef 100644
--- a/tests/Feature/Integration/TelepagosWebhookTest.php
+++ b/tests/Feature/Integration/TelepagosWebhookTest.php
@@ -33,6 +33,68 @@ class TelepagosWebhookTest extends TestCase
         Cache::flush();
     }
 
+    public function test_transfer_payment_intent_requires_a_valid_payer_dni(): void
+    {
+        $tenant = $this->createTenant('sonder', 'Sonder', 'sonder.com.ar');
+        $user = User::factory()->create();
+        $variant = $this->createVariantForTenant('sonder', 10, '50.00');
+        $purchase = $this->createPendingTransferPurchase($tenant, $user->id, $variant->id, 1, '12345678');
+
+        $this->actingAs($user, 'sanctum')
+            ->postJson("/api/tenants/sonder/compras/{$purchase->id}/payment-intent", [
+                'method' => 'transfer',
+            ])
+            ->assertUnprocessable()
+            ->assertJsonValidationErrors(['payer_dni']);
+
+        $this->actingAs($user, 'sanctum')
+            ->postJson("/api/tenants/sonder/compras/{$purchase->id}/payment-intent", [
+                'method' => 'transfer',
+                'payer_dni' => '12.345.678',
+            ])
+            ->assertUnprocessable()
+            ->assertJsonValidationErrors(['payer_dni']);
+    }
+
+    public function test_transfer_payment_intent_persists_payer_dni_without_replacing_customer_dni(): void
+    {
+        $tenant = $this->createTenant('sonder', 'Sonder', 'sonder.com.ar');
+        $this->configureTelepagosIntegration($tenant);
+        $user = User::factory()->create();
+        $variant = $this->createVariantForTenant('sonder', 10, '50.00');
+        $purchase = $this->createPendingTransferPurchase($tenant, $user->id, $variant->id, 1, '12345678');
+
+        Http::fake([
+            'https://api.telepagos.com.ar/v2/auth/token' => Http::response([
+                'status' => 'ok',
+                'token' => 'test-token',
+                'expires_at' => now()->addHour()->toIso8601String(),
+            ]),
+            'https://api.telepagos.com.ar/v2/account/info' => Http::response([
+                'status' => 'ok',
+                'holder' => 'Telepagos Test',
+                'cvu' => '0000003100000000000001',
+                'alias' => 'telepagos.test',
+                'entity' => 'Telepagos S.A.',
+            ]),
+        ]);
+
+        $this->actingAs($user, 'sanctum')
+            ->postJson("/api/tenants/sonder/compras/{$purchase->id}/payment-intent", [
+                'method' => 'transfer',
+                'payer_dni' => '23456789',
+            ])
+            ->assertOk()
+            ->assertJsonPath('transfer_data.alias', 'telepagos.test');
+
+        $this->assertDatabaseHas('compras', [
+            'id' => $purchase->id,
+            'dni' => '87654321',
+            'payer_dni' => '23456789',
+            'payment_method' => 'transfer',
+        ]);
+    }
+
     public function test_transfer_webhook_matches_pending_purchase_by_dni_and_total_amount(): void
     {
         $tenant = $this->createTenant('sonder', 'Sonder', 'sonder.com.ar');
@@ -209,7 +271,7 @@ class TelepagosWebhookTest extends TestCase
 
         $purchase = $checkoutService->startCheckout($tenant, $userId, [
             'cart_id' => $cart->id,
-            'dni' => $dni,
+            'dni' => '87654321',
             'telefono' => '+54 9 341 555-4321',
             'nombre_apellido' => 'Juan Perez',
             'email' => 'juan.perez@example.com',
@@ -217,6 +279,7 @@ class TelepagosWebhookTest extends TestCase
 
         $purchase->update([
             'payment_method' => 'transfer',
+            'payer_dni' => $dni,
         ]);
 
         $checkoutService->completePurchase($purchase);