Certificate of no impediment apostille – UK legalisation service

Fast, secure apostille service for your certificate of no impediment

We provide fast apostille and legalisation services for Certificates of No Impediment (CNI), including priority FCDO apostille UK processing and secure tracked delivery. This service is commonly required for marriage or civil partnership applications overseas.

What is a certificate of no impediment?

A Certificate of No Impediment (CNI) is an official UK document confirming that there is no legal reason preventing a person from getting married or entering into a civil partnership abroad.

Why you may need an apostille

You may require an apostille for:

  • Marriage abroad
  • Civil partnership registration overseas
  • Visa and immigration applications
  • Registering your marriage with foreign authorities

An apostille ensures your Certificate of No Impediment is legally recognised in Hague Apostille Convention countries.

Can I legalise a certificate of no impediment?

Yes — a UK Certificate of No Impediment can be legalised for international use, provided it meets the required format and certification standards.

Apostille requirements
  • Original Certificate of No Impediment required
  • Document must be issued by a UK registry office or authorised authority
  • Laminated documents may not be accepted by the FCDO
Acceptable formats for legalisation

✔ Original Certificate of No Impediment issued in the UK
✔ Official certified copies issued by the relevant authority where accepted
❌ 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.