Check 12 / 12 LOW impact In the full checklist
International duties calculator at checkout
What this check is
An unexpected customs charge on delivery is the fastest route to a refused parcel and a chargeback. Showing the duties or the landed total before payment removes that risk from the shopper.
How to implement it
Enable the duties and import-tax calculation for the lanes where you offer it and display the landed cost at the shipping step, or ship DDP where you can absorb it. State clearly which countries are covered and which are not.
How to verify it
Run a checkout to a country with duties enabled and confirm the landed total includes the duty, then compare it against a duty calculator for the same product value and destination.
All 197 checks, one Google Sheet
This page is the summary. The full checklist carries the priority, the impact score and the tool link for every check — all 197 of them, across 14 categories, as a Google Sheet and CSV with lifetime updates.
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