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Certification Issues With a Foreign Country

Internal Revenue Manual Part 21. Customer Account Services · 2026-10-03 edition · updated 2026-10-04 · United States

A foreign country’s rejection of a Form 6166 Residency Certificate resulting from foreign legislative changes or other new requirements, including requirements for language not in a standard Form 6166 must be referred to the U.S. Competent Authority Office, ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ See examples below:

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▸Contents — Internal Revenue Manual Part 21. Customer Account Services

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