Aglet

How to investigate a checkout address validation failure

Investigate the exact address shape through normalization, shipping selection, tax calculation, and order persistence. Compare what the shopper entered with what each stage receives. Possible causes include field mapping, locale parsing, stale selection, or an unavailable downstream response; none should be asserted without matching evidence.

Build a useful investigation brief

  1. Reconstruct normalization

    Compare raw test fields with normalized street, unit, region, and postal values. Check capitalization, punctuation, abbreviations, and country-specific field mapping. Note whether the normalized response drops information or changes a value that later rules need.

  2. Follow dependent calculations

    Use the normalized address to request shipping and tax states. Compare a passing neighboring address and record which input differs. Capture response status, validation messages, and timing. A shipping or tax rejection may be downstream of normalization rather than its origin.

  3. Inspect persistence and resume

    Interrupt after validation, return to the address step, and reload the cart. Check whether entered and normalized fields are stored consistently. Verify the order record uses the same approved address and that a failed attempt does not leave a partial destination behind.

What to carry forward

The brief is reproducible when another engineer can supply the same field shape and see the same normalization or dependent calculation difference. Include raw-to-normalized comparisons, response timing, persistence behavior, and unresolved rule ownership before recommending a change.

Keep the decision with the work.

Use a Work Item in Aglet to record the problem, the evidence you have, and the next decision. Add an owner and priority, then keep updates in the discussion so the next person can follow the reasoning.

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