Submit an Affidavit to Amend a Vital Record, a Birth Certificate Application, a copy of the requester's ID, and a check or money order for the correct fees. STATE FILE NUMBER: 1a.Most vital records may be amended. All amendments require an affidavit or court order. The parent(s) may add or correct the surname from that listed on the record until the child's first birthday without documentation. Utah name change forms allow residents to legally change their name through the district court of the county in which they reside. In the affidavit, you would state your true name and the name that is on the document that you are trying to prove is a mismatch. The Lawyer can help with objecting to a witness affidavit in Utah if it's not notarized, based on UT code 78B5701. Download Utah Affidavit of Identity template, modify and send for signing using BoloForms Signature. If you need to make an affidavit in Utah, you should keep a few things in mind.