A certificate of no impediment may be needed when getting married abroad. Learn what a CNI is, when UK citizens may need one, how it is usually obtained and whether it may need translation or legalisation.

If you are getting married abroad, you may be asked for a certificate of no impediment, often shortened to CNI. This is one of the most common documents requested from UK citizens who need to prove they are legally free to marry overseas.

The exact requirements depend on the country where the ceremony will take place. Some countries ask for a CNI, while others ask for a statutory declaration, affirmation or another local equivalent.

What is a certificate of no impediment?

A certificate of no impediment is a document that confirms no legal objection has been found to your proposed marriage or civil partnership.

In simple terms, it helps show that you are free to marry. GOV.UK says British nationals getting married or registering a civil partnership abroad may need documents such as a certificate of no impediment or an affirmation.

When might you need a CNI?

You may need a certificate of no impediment if you are a UK citizen planning to get married or enter into a civil partnership in another country.

It is commonly requested for overseas weddings, especially where the local authority needs official evidence of your marital status before approving the ceremony.

You may be asked for a CNI if:

• You are getting married abroad
• You are entering a civil partnership overseas
• The foreign authority asks for proof that you are free to marry
• Your wedding venue, registrar or municipality includes it in their document checklist
• You need to provide paperwork before travelling for the ceremony

You should always check the rules in the country where the marriage will take place. GOV.UK advises British nationals to check the law in the chosen country and confirm the process with the person conducting the ceremony or the wedding venue.

How do you get a certificate of no impediment?

In many cases, you apply through your local register office in the UK. You may need to give notice of your intention to marry abroad, provide details of your partner and confirm where the ceremony will take place.

Local register offices often advise applicants to check first whether the destination country actually requires and accepts a CNI. Some councils also state that a CNI can only be issued to British citizens.

The process may include:

• Booking an appointment with your local register office
• Giving notice of your intended marriage or civil partnership abroad
• Providing identification and proof of address
• Giving details of your partner
• Confirming the town, locality and country of the ceremony
• Waiting for the notice period to pass before the certificate is issued

Some register offices state that the certificate is issued after a 28-day waiting period if there is no objection.

What information might you need to provide?

Requirements can vary, but you may be asked for:

• Valid passport
• Proof of address
• Full name and date of birth
• Partner’s full name and details
• Destination country
• Town or locality where the ceremony will take place
• Evidence of marital status
• Divorce document, if previously married
• Death certificate of a former spouse, if widowed
• Change of name document, if your name has changed

It is important to give accurate destination details. Some register offices ask for the exact town, locality and country where the ceremony will take place before they can record your notice.

Is a CNI always required?

No. Not every country asks for a certificate of no impediment. Some countries use a different document, such as an affirmation or statutory declaration. Others may have their own local process.

There are also countries where a UK-issued CNI may not be available or may not be the correct document. GOV.UK provides a country-specific service to help British nationals find out which documents may be needed for marriage or civil partnership abroad.

Does a CNI need to be legalised?

A certificate of no impediment may need to be legalised before it is accepted overseas. Legalisation confirms that the signature, seal or stamp on the document is genuine.

This is often required when a UK public document is being used by a foreign authority. However, requirements vary by country, so you should check with the destination authority before arranging legalisation.

Does a CNI need to be translated?

If the country where you are getting married does not use English as an official language, your CNI may need to be translated.

Some authorities require a certified translation, while others may ask for a sworn translation or a translation completed by an approved translator. The order can matter too, so check whether the CNI should be translated before or after legalisation.

CNI vs statutory declaration

A certificate of no impediment and a statutory declaration are not the same thing.

A CNI is usually issued through the register office process and confirms that no objection has been found. A statutory declaration is a formal written statement, often used to confirm your marital status or other facts.

Some countries ask for one. Some ask for both. Some ask for a different local equivalent. Always follow the checklist provided by the authority where the marriage will be registered.

Checklist before applying for a CNI

Before applying, check:

• Whether the destination country requires a CNI
• Whether the authority accepts a UK-issued CNI
• Whether you need a CNI, affirmation or statutory declaration
• Which register office you should contact
• Whether you know the exact ceremony location
• Whether your documents need to be issued within a certain timeframe
• Whether the CNI needs legalisation
• Whether the CNI needs translation
• How long the process may take before the wedding date

Final thoughts

A certificate of no impediment is an important document for many UK citizens getting married abroad. It helps show that you are free to marry, but it is not required in every country and it may not be the only document you need.

The safest approach is to check the official requirements for your wedding destination first, then arrange your CNI, translations and legalisation in the correct order. Starting early can help avoid delays and make the overseas marriage process much smoother.

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