1. Gather the decedent's personal details. Complete Form ET-141 if it is claimed that the decedent was not domiciled in New York State at the time of death.How to Fill Out an Affidavit of Domicile With SignSimpli in Five Steps. The good news is that filling out an affidavit of domicile is fairly simple. Use our affidavit of domicile form to verify the last home address of a deceased person to speed up the inheritance process. RULE 2106: Affirmation of truth of statement. Use our Affidavit of Domicile form to verify the last home address of a deceased person to speed up the inheritance process. Using PDFRun, you can electronically fill out and download a PDF copy of an Affidavit of Domicile Form PDF in minutes. This affidavit is made for the purpose of securing the transfer or delivery of property owned at the time of the decedent's death to a purchaser. An Affidavit of Domicile is a legal document that you can use to verify the home address of a person who has died.