UPI error code · Risk / security
UPI error K1: Suspected fraud — remitter bank declined
The payer's bank's fraud engine blocked the debit.
Apps may show it as: “fraud”, “suspected fraud”, “risk detected”
- Who declined it
- Payer's bank
- Type
- Risk / security
- Money debited?
- Usually no debit
- Refund
- Usually no debit
Is money deducted on UPI error K1?
Usually not: K1 is normally declined before the debit. Confirm with your bank SMS or passbook rather than the app tile.
How to fix UPI error K1
The customer should call the bank's fraud desk. Retrying can extend the block. Use another account only if the bank says it is safe.
Shopkeepers: is K1 a problem with my QR?
Do not coach the customer to bypass a fraud decline.
Never release goods on a green screenshot alone. Match the UTR in your bank SMS, ledger or soundbox.
If it keeps failing
- Open the failed payment in the app and copy the 12-digit UTR.
- Use Raise issue or Check status in the app first.
- Then call your bank with the UTR, amount and time. NPCI's UPI helpdesk is 1800-120-1740.
- After 30 days without a fix, complain on the RBI ombudsman portal, cms.rbi.org.in.
Related error codes
Last reviewed 26 August 2026. Meaning based on: PhonePe PG: TXN_BLOCKED; Decentro. Apps word codes differently, so if your bank describes K1 another way, trust the bank and keep the UTR.
Sources: PhonePe Payment Gateway error codes · Zerodha NPCI UPI reason codes · RBI TAT for failed UPI (DPSS.CO.PD No.629/02.01.014/2019-20)