Authentication & Apostille for United Kingdom citizens in the United States — 2026

Authenticating documents means making U.S. documents legally valid in United Kingdom, or United Kingdom documents valid in the United States. The process depends on whether United Kingdom is a Hague Apostille Convention signatory.

United Kingdom consulates processing authentications

When do you need authentication?

You need authenticated documents to:

• Marry abroad (FBI background check, divorce decree)
• Work or study in United Kingdom (diplomas, academic transcripts)
• Conduct business (corporate documents, powers of attorney)
• Inherit property or settle legal affairs
• Adopt a child or claim citizenship by descent

Required documents

• Original U.S. document (vital records, court orders, FBI check, etc.)
• Notarization by a U.S. notary (if not from a government agency)
• Authentication by the Secretary of State of the issuing state
• Apostille (Hague Convention) or consular legalization (non-Hague)

The authentication chain

For Hague Convention countries (apostille):

1. Get the document notarized (if private)
2. Submit to Secretary of State for apostille
3. Done — apostille is recognized internationally

For non-Hague countries (consular legalization):

1. Get the document notarized (if private)
2. Authenticate at Secretary of State
3. Authenticate at U.S. Department of State (sometimes)
4. Legalize at the United Kingdom consulate

Costs and processing times

Consular legalization fee at United Kingdom consulates: typically $30-$100 per document. Total processing chain: 2-6 weeks.