To change your name through marriage, you must include your new name on your Marriage License at the time the license is issued by the County Clerk and prior to your ceremony. Review the Name Equality Act of 2007 to know the name changes allowable through marriage.
Your name is legally changed upon having your ceremony. It is
up to you to inform the correct identification agencies (such as
Social Security, DMV, Passports, etc.) that you changed your name
through marriage. It is up to you to contact any agencies for their
requirements to update your name.
You will likely need certified copies of your marriage certificate in order to prove that you changed your name through marriage. Your marriage certificate will have your former name at the top, and your new name at the bottom of the certificate.
If you do not include the new name on the Marriage License, then your name will not be changed through marriage.
If you wish to change your name after-the-fact, you will need to do so through a legal name change with the court. You may not add or amend this information on the marriage license or marriage certificate at a later date.
For your protection, if you have any questions regarding whether you should or should not list your new name on the marriage license application, and/or how the Name Equality Act of 2007 may affect you, please consult an attorney prior to applying for your marriage license.