MasterCard uses the four main categories to organize its reason codes: Authorization, Card Member Disputes, Fraud, and Processing Errors (which MasterCard refers to as Point-of-Interaction Errors).
Code
Description
How To Win
4802
Requested/Required Item Illegible or Missing
4807
Warning Bulletin File
4808
Requested/Required Authorization Not Obtained
4812
Account Number Not on File
4831
Transaction Amount Differs
4834
Duplicate Processing
4835
Card Not Valid or Expired
4837
No Cardholder Authorization
4840
Fraudulent Processing of Transactions
4841
Cancelled Recurring Transaction
4842
Late Presentment
4846
Correct Transaction Currency Code Not Provided
4847
Exceeds Floor Limit – Not Authorized and Fraudulent Transaction