A California affidavit form is fairly straightforward, requiring basic identifying information along with the details to which you are attesting. Official Forms for Viewing and Downloading.All persons entitled to receive assets must sign the affidavit and the signatures must be notarized. For more information, see Probate Code §13100. Instructions: Employee must fill out sections 1, 2, 3, and 4; the Employer must return the completed form to CCCERA. Contact Us. Registrar of Voters. . 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. Contra Costa County Grant Deed Form. Fill in the blank form formatted to comply with all recording and content requirements.