Discover uses two-letter codes: NA, UA, and NF for fraud, AT for authorization, RG, RM, and NC for consumer disputes, and LP, IC, and IN for processing errors. Windows range from 45 days on authorization codes to 120 days on most consumer and processing disputes.
Find the code from your dispute notice below and open it to see what the code means, the response strategy for its dispute category, the evidence checklist to gather, and the evidence window you have to submit through your payment processor. Always respond inside the window - a late rebuttal forfeits the dispute regardless of merit.