diff --git a/cashu/lightning/lnd_grpc/lnd_grpc.py b/cashu/lightning/lnd_grpc/lnd_grpc.py
index 9ecbc59d..6bea7b4c 100644
--- a/cashu/lightning/lnd_grpc/lnd_grpc.py
+++ b/cashu/lightning/lnd_grpc/lnd_grpc.py
@@ -325,23 +325,27 @@ async def get_payment_status(self, checking_id: str) -> PaymentStatus:
             self.endpoint, self.combined_creds
         ) as channel:
             router_stub = routerstub.RouterStub(channel)
-            async for payment in router_stub.TrackPaymentV2(request):
-                if payment is not None and payment.status:
-                    preimage = (
-                        payment.payment_preimage
-                        if payment.payment_preimage
-                        != "0000000000000000000000000000000000000000000000000000000000000000"
-                        else None
-                    )
-                    return PaymentStatus(
-                        result=PAYMENT_RESULT_MAP[payment.status],
-                        fee=(
-                            Amount(unit=Unit.msat, amount=payment.fee_msat)
-                            if payment.fee_msat
+            try:
+                async for payment in router_stub.TrackPaymentV2(request):
+                    if payment is not None and payment.status:
+                        preimage = (
+                            payment.payment_preimage
+                            if payment.payment_preimage != "0" * 64
                             else None
-                        ),
-                        preimage=preimage,
-                    )
+                        )
+                        return PaymentStatus(
+                            result=PAYMENT_RESULT_MAP[payment.status],
+                            fee=(
+                                Amount(unit=Unit.msat, amount=payment.fee_msat)
+                                if payment.fee_msat
+                                else None
+                            ),
+                            preimage=preimage,
+                        )
+            except AioRpcError as e:
+                # status = StatusCode.NOT_FOUND
+                if e.code() == grpc.StatusCode.NOT_FOUND:
+                    return PaymentStatus(result=PaymentResult.UNKNOWN)
 
         return PaymentStatus(result=PaymentResult.UNKNOWN)
 
diff --git a/tests/test_mint_init.py b/tests/test_mint_init.py
index 4d7d4a51..71aa7021 100644
--- a/tests/test_mint_init.py
+++ b/tests/test_mint_init.py
@@ -444,8 +444,8 @@ async def test_startup_regtest_pending_quote_unknown(wallet: Wallet, ledger: Led
     assert melt_quote
     assert melt_quote.pending
 
-    # manipulate the checking_id
-    melt_quote.checking_id = "unknown_payment"
+    # manipulate the checking_id 32 bytes hexadecmial
+    melt_quote.checking_id = "a" * 64
     await ledger.crud.update_melt_quote(quote=melt_quote, db=ledger.db)
 
     await asyncio.sleep(SLEEP_TIME)