Documents needed to change your name on your passport
There are many reasons why you would wish to change the name on your passport. This could be marriage, change of appearance, gender reassignment, etc.
However, the most common reason is marriage, and you will need to send your civil or marriage certificate with your application for a new change of name passport.
Read our dedicated article about ‘Documents required for overseas marriage and civil partnerships.’
Here’s a look at the document requirements for different reasons for a name change:
You can get a new passport before or after the marriage ceremony.
If you wish to get a new passport after the ceremony, you need to send your civil/marriage partnership certificate when applying for a passport in the new name.
If you wish to apply for a new passport before the ceremony, you can apply for one up to three months before the civil partnership or marriage ceremony.
The old passport, in this case, will be cancelled, and a new ‘post-dated’ one will be issued before the ceremony. 
After getting divorced
After a divorce, you will need multiple documents for a name change on your passport, which include the following:
After changing your gender
If you have changed your gender, you can change the name on your passport. You will, however, need to provide the following documents:
Please note: When sending your doctor’s letter, or a letter from your medical consultant, for a name change, you should also send a deed poll as evidence that you are using the new name documents.
When you need to change the spelling or a letter or when you need to add a title to your name
Receiving a knighthood will require you to change your name. You may also need to change the spelling, for example, from Bryan to Brian. These are situations that would require you to change your passport.
You will be required to provide the following documents:
Your driving licence that shows your new name
Your bank statement showing the new name
A government/council letter
Your baptism and/or confirmation certificate
Other reasons for a change of name
If you changed your name for any other reason, then you would need to provide a statutory declaration, affidavit or deed poll.
You will also be required to send proof that you are now using the new name, e.g., a payslip.