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Two different clocks

ClockTypical rangeWhere it lives
Cardholder filingOften up to about 120 days; longer in some industries when the service date is later than paymentNetwork rules; you cannot see this clock directly
Merchant responseOften 7–21 days after processor notification; Square's public walkthrough uses a 7-day windowThe due date on the dispute in your dashboard
Issuer review after you submitOften 60–75 days, sometimes longerYou wait; you generally cannot speed this up
  1. Case opens — processor notifies you

    The dashboard shows the reason, amount, and a case-specific due date. Save those facts before gathering files.

  2. Your window — answer before the due date

    The merchant response window is often measured in days, but the network, processor, reason, and case control the actual deadline.

  3. After submit — issuer review

    The processor forwards the response; review time is outside the merchant response window and does not extend it.

  4. Outcome — funds return or remain debited

    The issuer or network process determines the result. A saved draft is not the same as a submitted response.

What processors publish

Shopify shows the due date in the store timezone. If no time is shown, treat it as 11:59 p.m. that date. Evidence can be edited until that due date unless you click Submit now, which locks it. Shopify then sends the package on the due date (or immediately if you submit early). There are no exceptions after the deadline.

Stripe says missing the deadline is an automatic loss. You get one submission; Stripe forwards it immediately.

Square's public dispute articles describe a short, case-specific window in the Disputes dashboard. Confirm the date on that dispute rather than reusing another case's deadline.

If you miss it

Late evidence is typically not accepted. The funds stay reversed. The dispute still counts toward your rate. Do not assume a customer withdrawal after the deadline will reopen the portal.