Civil partnership & conversion certificate apostille – UK legalisation service

Fast, secure apostille service for your civil partnership or conversion certificate

We provide fast apostille and legalisation services for civil partnership certificates and conversion certificates, including priority FCDO apostille UK processing and secure tracked delivery. This service is commonly required for immigration, overseas registration and legal recognition abroad.

What is a civil partnership or conversion certificate?

A civil partnership certificate is an official UK document confirming the legal registration of a civil partnership.

A conversion certificate confirms that a civil partnership has been legally converted into a marriage under UK law.

Why you may need an apostille

You may require an apostille for:

  • Immigration and visa applications
  • Registering a marriage or civil partnership overseas
  • Residency or citizenship applications
  • Changing legal status abroad
  • Foreign legal or family matters

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

Can I legalise a civil partnership or conversion certificate?

Yes — UK civil partnership and conversion certificates 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 General Register Office (GRO) or authorised UK registry office
  • Laminated documents may not be accepted by the FCDO
Acceptable formats for legalisation

✔ Original UK civil partnership certificate
✔ Original UK conversion certificate
✔ Official certified copies issued by the relevant UK authority
❌ 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.