Take your originals and copies directly to the Clerk's Office in Room 103 of the Wakefield. If you can't afford the fee, you can ask the court to waive it.Forms ; NC-420, Declaration in Support of Publication to File Documents Under Seal in Name Change Proceeding Under Address Confidentiality Program (Safe at Home). In California, you can ask for a court order to change your legal name. To do this, you file a petition with the court and publish a notice in a newspaper. The Corrective Affidavit must be completed, and attached to the original or a certified copy of the document that is to be re-recorded. The following is a list of some documents that may be recorded if they meet all requirements, and a description or definition of each document. Legal name change in Contra Costa County. Top-rated Contra Costa County name change service, we help with petition forms and court filings. Yes, you can use an affidavit to prove a name mismatch.