400 response with parameter_missing or documentation_missing errors. This reference lists, per network, the requirements for each dispute type. Evidence beyond these requirements is also recommended, see Dispute Types.
Mastercard
Required fields
Required documentation
Visa
Required fields
Required documentation
American Express
Required fields
Required documentation
For the full list of recommended evidence per dispute type, see the Dispute Types documentation. For filing windows and earliest-filing dates, see Filing Timelines.