A confirmation SMS for a payment at 11 PM for a purchase you didn’t make, a debit of a few euros followed by a larger one the next day: fraud on a credit card at Crédit Agricole is often detected by these micro-signals in the account history. The speed of the reaction determines both the blocking of losses and the ease of reimbursement.
Detecting a fraudulent transaction on your Crédit Agricole statement
Fraud is rarely spotted at once. The most common pattern: a small test debit (less than two euros), followed in the following days by larger purchases. Checking the Ma Banque app every morning allows you to catch this first signal before it escalates.
Another frequent trap: a transaction description that does not correspond to any recent purchase. On the statement, the name of the merchant may differ from the brand where you paid, creating confusion. Before disputing, check your receipts and email confirmations. If nothing matches, move on to the next step without delay.
You may also be alerted by a call or SMS posing as Crédit Agricole. The display of the bank’s official number does not prove that the call is authentic. The right reflex: hang up and call back the number on the back of your card or on the official website.
Blocking your Crédit Agricole credit card: the steps to follow
Blocking the card is the first action, but a block does not replace the written dispute of already incurred debits. These are two distinct processes, and forgetting the second delays reimbursement.
For the block, several channels work at Crédit Agricole:
- The Ma Banque app, under the “Cards” section, allows you to block the card in a few seconds, even on a Sunday evening.
- The interbank blocking number 0 892 705 705, available 24/7, which provides a registration number that must be kept.
- A direct call to your advisor or branch during opening hours to combine blocking and the start of a dispute in the same exchange.
Once the card is blocked, each disputed transaction must be reported separately, with its date and amount. An email or registered letter to the branch serves as proof of sending. The legal deadline for disputing is thirteen months after the debit, but it is in your best interest to act in the days following the discovery. All steps are detailed on the Guide Finance website for disputing a transaction, which helps structure the file from the start.
Reimbursement for credit card fraud: what Crédit Agricole must apply
The bank is required to reimburse unauthorized transactions unless it demonstrates gross negligence on the part of the account holder. In practice, the reimbursement must occur no later than the next business day after receiving the dispute, according to the monetary and financial code.
The sticking point often is the notion of gross negligence. For example, having communicated your confidential code over the phone to a fake advisor can be invoked by the bank to refuse reimbursement. A recent ruling clarifies the role of strong authentication in these disputes, but its scope depends on the circumstances and the nature of the transaction.
Card fraud and manipulation fraud: two different treatments
Classic card fraud (stolen number, diverted contactless payment) and manipulation fraud (fake advisor getting a transfer validated) are not treated the same way. If a scammer has pushed you to add a beneficiary and validate a transfer, report the transfer and the added beneficiaries, not just the card.
The Observatory of Payment Security notes an increase in manipulation fraud in the first half of 2025, while card fraud is declining. So also check the list of your registered beneficiaries and the history of your transfers, not just card payments.
Filing a complaint and reporting on Perceval after banking fraud
Filing a complaint is not always required by the bank for reimbursement, but it strengthens the case in the event of a refusal or subsequent dispute. You can file a complaint at a police station, gendarmerie, or directly online via the pre-complaint.
Reporting on the Perceval platform (accessible via France Connect) is specifically designed for credit card fraud. It generates a receipt that serves as proof for Crédit Agricole. The two processes, complaint and Perceval reporting, are complementary.
What to do if Crédit Agricole refuses reimbursement
In case of a refusal based on alleged gross negligence, you can contact the banking mediator of Crédit Agricole by mail. This procedure is free and suspends the limitation periods.
If mediation fails, recourse to the judicial court remains possible. Gather evidence of the block, the Perceval receipt, a copy of the complaint, and all written exchanges with the bank.
Banking fraud on a Crédit Agricole card is managed by sequentially taking three actions without delay: blocking the card, disputing each transaction in writing, and reporting on Perceval. Keeping each dated proof remains the best lever for obtaining a quick reimbursement, regardless of the fraud scenario encountered.
