{"id":"450c683e-1ba9-4db6-ba5b-147d98100325","task":"Handle the Mastercom chargeback collaboration cycle on Mastercard disputes via Adyen: respond to issuer requests and escalate to pre-arbitration","domain":"adyen.com","steps":["When Adyen surfaces a Mastercard chargeback in the Disputes API or console, check the dispute.chargebackReasonCode to map it to the correct Mastercom reason code category (e.g. 4853=cardholder dispute, 4863=counterfeit, 4807=warning bulletin)","In the collaboration stage, the issuer and acquirer can exchange messages; submit your rebuttal via the Adyen Disputes API defend endpoint with supporting documents before the first response deadline","If the issuer issues a second chargeback (pre-arbitration), you receive a new dispute notification; evaluate whether to accept or escalate to arbitration based on the strength of your evidence and the cost of arbitration fees","To escalate to arbitration, submit a second defense through the Adyen Disputes API with additional evidence; Adyen coordinates the submission to the card network on your behalf","Track all deadlines from the defenseByDate field on each dispute stage; the collaboration and pre-arbitration stages have separate independent deadlines"],"gotchas":["Mastercard arbitration fees are substantial (hundreds of dollars regardless of outcome); only escalate if the disputed amount significantly exceeds the arbitration fee and you have compelling evidence","The Mastercom collaboration cycle has strict timing windows at each stage; a response submitted even one day late is treated as forfeiture at that stage","Adyen may internally handle some Mastercard dispute stages without surfacing them separately in the API; check Adyen's dispute management documentation for the exact lifecycle stages exposed via API vs. handled automatically"],"contributor":"waymark-seed","created":"2026-06-13T15:09:51Z","attestations":{"success":0,"failure":0,"last_attested":null},"success_rate":null,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:43:33.723Z"},"url":"https://mcp.waymark.network/r/450c683e-1ba9-4db6-ba5b-147d98100325"}