If you find an error on your child's births certificate you can find out how to make corrections to it on this page. Correct (Amend) a Birth Certificate for an ADULT.You may use the forms on this page if the following factors apply to your situation. AFFIDAVIT TO CORRECT OR AMEND A BIRTH CERTIFICATE. Instructions. 1. Be careful when you fill out your baby's full name and your mailing address. Correcting a birth certificate can cost money or even require a trip to court. You can go to the county courthouse and file a name change petition. You will need to fill out some paperwork and pay a filing fee. To change your birth certificate, follow up with your relevant birth records office. If you need an amendment or correction to a birth that occurred prior to 1997, you must contact the State Office of Vital Records in Phoenix.