Instant reference for Visa VDR, Mastercard MDR, and Amex CMG dispute reason codes. Look up any code to see the dispute category, required response documentation, filing deadlines, and arbitration rules. Client-side. Zero PII.
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Visa VDRMC MDRAmex CMGZero PIIClient-Side
Scope & reliance —🔒 All inputs are processed locally in your browser. No data is transmitted. Do not enter real personal data — use synthetic or anonymised inputs only. Embedded rates, thresholds, and regulatory citations are static reference values that may age — verify against current primary sources and your own data before relying on any output for commercial, legal, or compliance decisions. Deterministic logic · no inference · zero PII · CC BY 4.0.
⚠ Reference data as of May 2026. Always verify deadlines and requirements against the current Visa Dispute Resolution Rules (VDR), Mastercard Dispute Resolution Rules (MDR), and Amex Chargeback Management Guidelines (CMG) before filing. Scheme rules update periodically.