diff --git a/app/services/payment/yookassa.py b/app/services/payment/yookassa.py
index 45bacc04..a87f0b7c 100644
--- a/app/services/payment/yookassa.py
+++ b/app/services/payment/yookassa.py
@@ -382,6 +382,63 @@ class YooKassaPaymentMixin:
             from sqlalchemy import select
             payment_module = import_module("app.services.payment_service")
 
+            existing_transaction_id = getattr(payment, "transaction_id", None)
+            if existing_transaction_id:
+                logger.info(
+                    "Пропускаем повторную обработку платежа YooKassa %s: уже связан с транзакцией %s",
+                    payment.yookassa_payment_id,
+                    existing_transaction_id,
+                )
+                return True
+
+            existing_transaction = None
+            try:
+                existing_transaction = await payment_module.get_transaction_by_external_id(  # type: ignore[attr-defined]
+                    db,
+                    payment.yookassa_payment_id,
+                    PaymentMethod.YOOKASSA,
+                )
+            except Exception as lookup_error:  # pragma: no cover - защитный лог
+                logger.warning(
+                    "Не удалось проверить существующую транзакцию для платежа YooKassa %s: %s",
+                    payment.yookassa_payment_id,
+                    lookup_error,
+                    exc_info=True,
+                )
+
+            if existing_transaction:
+                logger.info(
+                    "Платеж YooKassa %s уже обработан транзакцией %s. Пропускаем повторное начисление.",
+                    payment.yookassa_payment_id,
+                    existing_transaction.id,
+                )
+
+                if not getattr(payment, "transaction_id", None):
+                    try:
+                        linked_payment = await payment_module.link_yookassa_payment_to_transaction(  # type: ignore[attr-defined]
+                            db,
+                            payment.yookassa_payment_id,
+                            existing_transaction.id,
+                        )
+                        if linked_payment:
+                            payment.transaction_id = getattr(
+                                linked_payment,
+                                "transaction_id",
+                                existing_transaction.id,
+                            )
+                            if hasattr(linked_payment, "transaction"):
+                                payment.transaction = linked_payment.transaction
+                    except Exception as link_error:  # pragma: no cover - защитный лог
+                        logger.warning(
+                            "Не удалось привязать платеж YooKassa %s к существующей транзакции %s: %s",
+                            payment.yookassa_payment_id,
+                            existing_transaction.id,
+                            link_error,
+                            exc_info=True,
+                        )
+
+                return True
+
             payment_description = getattr(payment, "description", "YooKassa платеж")
 
             payment_metadata: Dict[str, Any] = {}