Reference pagesReason codes
Processing error
Discover IN: Invalid Card Number
A Discover dispute reason code, what it asks you to prove, and what Do The Proof puts in the response.
What this code means
Number not on a valid account
What the network says wins it
the valid card number
proof of a valid authorization response
- Authorization and processing records
How the app handles it
Arrives in the app as: General
How long you have to respond
- Cardholder dispute window
- 120 days, or 540 days for non-receipt and quality, or 730 days for good faith
Where this comes from
- JPMorgan Chase, User Guide: Chargeback Reason Codes, October 2024
- Stripe, reason code categories Accessed 8 September 2026.
Other Discover processing error codes
Do The Proof drafts dispute responses for Shopify stores.
You pay when a dispute is won. Not before.