Mastercard 4849 — Questionable Merchant Activity
Fraud chargeback.
Code
4849 MastercardCategory
Fraud
What it means
The merchant is listed in a Mastercard fraud/audit program.
Evidence that wins
Usually not defensible.
How to prevent it
Keep fraud and chargeback ratios low.
Rules and deadlines differ by region and acquirer — always check the instructions in your PSP dashboard.