An affidavit of domicile is a legal document that certifies the residence of a deceased person. An affidavit of domicile is a sworn statement signed before a notary public establishing the legal domicile of someone who has died.An Affidavit of Domicile is a legal document that you can use to verify the home address of a person who has died. A Declaration of Domicile proves residency in Broward County, Florida. It is often used to enroll children or college students in school. On Form I864, petitioners must prove that they have the ability to financially support the visa applicant(s) if necessary. Domicile refers to the place where you currently live and intend to maintain as your permanent home. Domicile refers to the place you call home permanently. Your domicile is important for legal purposes such as paying taxes, voting, and claiming benefits. Domicile requires bodily presence in the state and specific intention to return when away.