You must upload your marriage certificate if you were married in the UK.
If you cannot find your marriage certificate, you must get a replacement from the relevant local Register Office.
If you were married in a religious ceremony that was not registered, upload any paperwork or certificate from where the ceremony took place. If you were not issued with any paperwork or a certificate, send a letter from a religious leader or the person who officiated the ceremony confirming the details.
Married outside the UK
If you cannot upload your marriage certificate or were never issued one, upload a sworn affidavit or other legal document that can demonstrate your marital status.
A sworn affidavit is a written statement made by a person who is under oath to tell the truth about facts and information contained in the statement.
The person signing the affidavit, called the affiant, much confirm their identity.
The affidavit must be witnessed and signed by a person who is legally authorised to administer oaths, such as a notary public or another qualified official, such as a court clerk, solicitor, or barrister.
Failure to provide any of the relevant evidence will result in the assessment of your application being delayed.