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One address, read by a person: [email protected]. We reply within two business days.
Something is wrong in an explanation
The most useful email we get. Send the question and what you think is wrong — we check it against the cited regulation and fix or retract it. Every explanation on the site cites its source precisely so this is checkable.
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Ask for a refund →Your data
A copy of what we hold, a correction, or deletion of your account and study history.
Make a data request →What we can't help with
We are not CBP. We cannot register you for the exam, look up your score, change your test centre, or answer questions about a license application. For any of that, contact CBP directly — our registration guide points at the right place.
We also can't give customs advice on a real shipment. The explanations here are exam preparation; a live entry needs a licensed broker looking at your actual paperwork.