Description of Reason Code 021
Insights from Rules and Regulations
Either the cardholder claims the good(s) or service(s) were canceled or expired, or they're claiming to be unsuccessful in their attempts to cancel the good(s) or service(s) with you (the merchant).
How to Win Reason Code 021
You can issue a credit, or provide a copy of your cancellation policy/contract signed by the cardholder and discontinue future billings.
Transaction Modifiers applicable to Reason Code 021