Submit Dispute Counter

Submit a draft counter’s evidence to the payment processor. This is one-shot and terminal for this round: the evidence is sent to the processor as your final response, the counter moves to submitted, and it can no longer be edited.

Only a draft counter on a dispute that is currently awaiting a response (e.g. Stripe needs_response) can be submitted — otherwise the call returns 400. Every attached file must both belong to you and have passed a malware scan (clean); otherwise the submission is rejected with 422 and nothing is sent. The dispute itself transitions (e.g. to under_review) when the processor’s webhook confirms receipt, not synchronously here.