diff --git a/api/routes/pally.py b/api/routes/pally.py
index f26df08..10744ad 100644
--- a/api/routes/pally.py
+++ b/api/routes/pally.py
@@ -34,7 +34,7 @@ async def pally_callback(
     bot: Bot = Depends(get_bot),
     deps: APIDependenciesDTO = Depends(get_deps),
 ):
-    oid = InvId
+    oid = InvId.removeprefix("payment-")
     raw_string = f"{OutSum}:{InvId}:{settings.pally_token}"
     expected_signature = hashlib.md5(raw_string.encode("utf-8")).hexdigest().upper()
 
@@ -49,7 +49,7 @@ async def pally_callback(
     logger.info("Received successfully paid bill %s", TrsId)
 
     if not oid.isdigit():
-        logger.critical("Invalid InvId format for TrsId %s", TrsId)
+        logger.critical("Invalid InvId format for TrsId %s: %s", TrsId, InvId)
         return "OK"
 
     bill = await deps.bills_repository.get_bill_by_id(session, int(oid))