Q1073. Must foreign tax payment receipts undergo legalization if used for tax deductions or filings in Thailand?

Answered by the NYC Visa & Translation legalization desk

Whether legalization is needed depends on the Thai tax procedure and the evidence requested by the Revenue Department. Start by identifying whether the receipt supports a business expense, foreign tax credit, or another claim, because the supporting-document requirements differ. Ask the receiving tax office whether it accepts the foreign receipt directly or requires an official tax certificate, Thai translation, or authenticated copy. If authentication is requested, confirm the route for the issuing country before arranging notarization or consular legalization. Keep proof of payment and records linking the tax to the relevant taxpayer, income, and tax year. A common pitfall is assuming legalization makes a foreign tax payment eligible for a Thai deduction or credit. Verify requirements with the Revenue Department before filing.