Use our Affidavit of Domicile form to verify the last home address of a deceased person to speed up the inheritance process. How Do I Fill Out an Affidavit of Domicile?An affidavit of domicile is a legal document that certifies the residence of a deceased person. Instructions for Completing Affidavit of Domicile. An Affidavit of Domicile is a document that acts as a written solemn oath that verifies where someone lived when they died. An Affidavit of Domicile is a concise legal document affirming a deceased person's primary place of residence at the time of death. The Affidavit of Domicile is a sworn statement verifying a deceased person's state of residence at time of death.