The short answer
Dispute resolution is the structured, time-bound process by which a chargeback moves between cardholder, issuer, acquirer, merchant, and ultimately the card network. Every step has a deadline. Missing a deadline means losing the dispute regardless of the merits. Understanding the sequence is how operators maintain a healthy chargeback ratio.
The stages
Stage 1: Dispute initiated
Cardholder contacts their issuing bank and disputes a transaction. Issuer files the dispute using one of ~40 reason codes (examples: Visa 10.4 fraud-cnp, Visa 13.1 merchandise not received, Mastercard 4853 cancelled recurring transaction). The reason code determines the entire downstream evidence requirement.
Stage 2: Chargeback posted to merchant
Acquirer pulls the disputed amount from the merchant's next settlement. The merchant is notified with the reason code, transaction details, and response deadline (typically 10-30 days depending on network + reason).
Stage 3: Merchant response (representment)
Merchant has two choices:
- Accept the loss. Funds stay with the issuer. Chargeback counts against ratio.
- Represent with compelling evidence. Submit documentation proving the charge was legitimate. See the evidence types required per reason code.
Stage 4: Issuer review
Issuer reviews the representment. Can:
- Accept the representment — merchant wins, funds returned.
- File pre-arbitration — re-dispute with additional evidence.
Stage 5: Pre-arbitration
Issuer files new evidence. Merchant has 30 days to respond: accept the loss or escalate.
Stage 6: Arbitration
Network decides. ~$500 filing fee per case, paid by losing party. Rare — <1% of disputes reach arbitration.
Critical timelines
- Chargeback to merchant: immediate on dispute posting
- Merchant representment response: 10 days (Visa), 30 days (Mastercard) from chargeback notification
- Issuer pre-arbitration filing: 30 days after merchant representment
- Merchant pre-arbitration response: 30 days
- Arbitration decision: typically 45-60 days from filing
Miss any deadline on the merchant side = automatic loss.
Reason code categories
- Fraud: unauthorized use, stolen card, CNP fraud. Visa 10.x, MC 4837/4849.
- Authorization errors: declined but still settled, expired card processed. Visa 11.x, MC 4808.
- Processing errors: duplicate charge, wrong amount, cancelled auth. Visa 12.x, MC 4834.
- Consumer disputes: merchandise not received, not as described, cancelled recurring. Visa 13.x, MC 4841/4853/4855.
Winning at dispute resolution
- Match evidence to reason code. Don't send fraud evidence on a "not as described" dispute.
- Include timestamps on everything. Signed TOS from 2 years ago with no transaction tie-in = useless.
- Submit on time. Late = automatic loss.
- Track outcomes. Pattern of losses on a specific reason code = product / process problem to fix upstream.
- Enroll in alerts. Verifi CDRN, Ethoca give you 24-72 hour heads-up before dispute posts; refund the customer, case closed.
Dispute KPIs to track
- Chargeback rate. Disputes / transactions. Stay under VAMP 0.9% / ECM 1.5%.
- Representment rate. Percentage of disputes you respond to (should be near 100%).
- Representment win rate. Industry standard 30-50%; best-in-class 60%+.
- Cost per chargeback. Processor fee + operational time + refund cost. Usually $50-$150 per.
How multiflow centralizes dispute resolution
Every chargeback across every sub-brand lands in one dispute queue in your operator portal. Reason codes are pre-classified, suggested evidence is templated per reason code, and deadlines are tracked with alerts 48 hours before a miss. Your dispute team works one inbox instead of four processor portals.