ToolerCat / Chargeback Reason Codes / Mastercard 4840 — Fraudulent Processing of Transactions

Mastercard 4840 — Fraudulent Processing of Transactions

Fraudulent Processing of Transactions. Multiple unauthorized transactions processed by the same merchant using the card.

Fraud chargeback.

Code

4840 Mastercard

Category

Fraud

What it means

Multiple unauthorized transactions processed by the same merchant using the card.

Evidence that wins

Proof each transaction was authorized by the cardholder.

How to prevent it

Monitor unusual card activity.

Rules and deadlines differ by region and acquirer — always check the instructions in your PSP dashboard.