Certificate of naturalisation or registration apostille – UK legalisation service

Fast, secure apostille service for your certificate of naturalisation or registration

We provide fast apostille and legalisation services for certificates of naturalisation and registration, including priority FCDO apostille UK processing and secure tracked delivery. This service is commonly required for immigration procedures, dual citizenship applications and legal recognition abroad.

What is a certificate of naturalisation or registration?

A certificate of naturalisation or registration is an official UK government-issued document confirming that a person has obtained British citizenship through naturalisation or registration.

Why you may need an apostille

You may require an apostille for:

  • Dual citizenship applications
  • Immigration and visa procedures
  • Overseas passport applications
  • Residency or citizenship matters abroad
  • Legal recognition of British citizenship overseas

An apostille ensures your certificate is legally recognised in Hague Apostille Convention countries.

Can I legalise a certificate of naturalisation or registration?

Yes — UK certificates of naturalisation and registration can be legalised for international use, provided they meet the required format and certification standards.

Apostille requirements
  • Original certificate required
  • Documents must be issued by the UK Home Office or authorised UK authority
  • Laminated documents may not be accepted by the FCDO
Acceptable formats for legalisation

✔ Original certificate of naturalisation
✔ Original certificate of registration
✔ Official replacement certificates issued by the UK authorities
❌ Photocopies, scans or unofficial printouts are not accepted

Embassy attestation (if required)

If your destination country is not part of the Hague Convention, additional embassy attestation may be required after the FCDO apostille UK process.

We can arrange:

  • Embassy attestation
  • Certified translations
  • PDF scanning
Our apostille service includes
  • Pre-submission document checks
  • Priority FCDO apostille UK submission
  • Secure tracked return delivery
  • Optional services: embassy attestation, translation and scanning
Processing time

Priority service:
Next working day submission to the FCDO if documents are received before 12:30 pm at our Milton Keynes office.

Most clients receive their apostilled documents within 1–2 working days after FCDO processing.