Nagesh Koritala

Learn Anatomy of a Checkout

Lesson 9 of 13

Disputes.

The chargeback lifecycle, the uneven clocks, and the checkout evidence that wins a dispute.

By Nagesh Koritala 4 min read Last verified: November 2026

  1. Lesson 1: Improve the checkout
  2. Lesson 2: The checkout flow
  3. Lesson 3: Authorization
  4. Lesson 4: Payment states
  5. Lesson 5: Capture
  6. Lesson 6: Clearing and settlement
  7. Lesson 7: Cash capture
  8. Lesson 8: Returns and refunds
  9. Lesson 9: Disputes (this lesson)
  10. Lesson 10: Tokens and stored credentials
  11. Lesson 11: Transaction types
  12. Lesson 12: Complete reference
  13. Lesson 13: Payments compliance
All 16 pages in this guide
  1. Improve the checkout
  2. The checkout flow
  3. Authorization
  4. Payment states
  5. Capture
  6. Clearing and settlement
  7. Cash capture
  8. Returns and refunds
  9. Disputes
  10. Tokens and stored credentials
  11. Transaction types
  12. Complete reference
  13. Payments compliance
  14. Follow one order
  15. Where it breaks
  16. Payments dictionary

Sometimes the customer skips you and goes to their bank. A chargeback is the bank pulling the money back through the network, and it arrives with a reason code: fraud, item not received, not as described, and so on.

The clocks are uneven. Cardholders generally have up to 120 days from the transaction or expected delivery date to dispute, with some exceptions in both directions. The merchant's response window is far shorter, from about 9 days to a few weeks depending on the brand (for Visa disputes in the US and Canada, processors may give you as little as 9 days), and your processor may give you less than the network does. Build disputes as an operational process with owners and deadlines.

Good checkout design is good dispute evidence. Address and security-code check results, 3-D Secure authentication, delivery tracking, clear return policies, and order confirmation emails are what win representments.

Sources for this guide

Card network rules change. Time limits, fees, and authorization windows here reflect published rules and provider documentation as of late 2026; confirm details with your processor before you build against them.

Sources

Your progress stays on this device.

Next: Lesson 10

Tokens and stored credentials.

FPAN, DPAN, MPAN, network tokens, and PAR, and which card number travels on each hop.

Start lesson 10All lessons

Questions about payments? Email me. I read every note.

Tokens: the real card number is swapped for a token before it travels. 4242 •••• Tokenthe card number stays home