The affidavit may be filed six months after death in the county of residence. Official Forms for Viewing and Downloading.At this clinic, attorneys can give you information about court procedures, provide court forms, and assist in filling them out. The Clerk-Recorder's Office does not offer blank forms of documents for recording. Clerk-Recorder Staff is prohibited from giving legal advice. Download PDF BOE-19-P REV. Contra Costa County Affidavit of Death of a Joint Tenant Form. Fill in the blank form formatted to comply with all recording and content requirements.