That I am well acquainted with the above-named decedent and make this affidavit regarding the legal domicile of said. 1. Gather the decedent's personal details.5 Provide the following information regarding the residences of the decedent during the last five years preceding death (submit additional sheets if necessary). Instructions for Completing Affidavit of Domicile. NOTE: The purpose of this guide is to help you settle the affairs of the deceased employee and to inform you of the benefits to which you are entitled. The county of the decedent's domicile or permanent address will determine where you will file. New York County (Manhattan).