1. Go to Stripe > Disputes and click the dispute (filter by Needs Response to find open ones). Check the Due by date in the Timeline.
2. Click Submit Evidence in the header (it is only shown while the dispute is open and no evidence has been sent yet).
3. In the Submit dispute evidence window fill in the text fields relevant to the dispute reason (customer name, email, billing/shipping address, product description, service or shipping date, tracking number, explanations...). Fields are pre-filled with anything already on the dispute.
4. Attach files where offered (Receipt, Customer Communication, Shipping/Service Documentation, Refund or Cancellation Policy, Other). Files are uploaded to Stripe as dispute evidence.
5. Click Submit Evidence and confirm the warning: "You can only submit evidence to the customer's bank once." If you may have more evidence later, cancel and come back.
6. On success you see "Evidence submmited with success!"; the page then shows an Evidence Submitted badge and an Evidence Submission panel recording who submitted it and when.

The bank makes a final decision within up to 3 months; the dispute moves to under_review and then won or lost.