The process differs depending on whether the transaction is fraudulent (someone else made it) or legitimate but wrong (you made it, but the merchant billed incorrectly, didn't deliver, or double-charged you).
| Situation | Dispute Type | Reporting Window |
|---|---|---|
| Transaction you never made | Unauthorized transaction / fraud | 3 working days for zero liability |
| Charged twice for one purchase | Chargeback (billing error) | Typically 60-120 days from statement date |
| Goods/services not delivered | Chargeback (non-receipt) | Usually within 120 days, per card network rules |
| Wrong amount billed | Chargeback (billing error) | Typically 60 days from statement date |
Warning: If the transaction is fraudulent, block your card immediately through the bank's app or helpline before doing anything else. Disputing does not stop further unauthorized use.