The Massachusetts Affidavit of Domicile is a document used to establish a person's legal domicile in the state of Massachusetts. It is a notarized statement of residency made by an individual, usually an adult, that states their intention to make Massachusetts their permanent place of residence. The affidavit is typically used by individuals who are relocating to the state or when a legal change of address is needed for estate planning or other purposes. There are two types of Massachusetts Affidavit of Domicile: a Non-Probate Affidavit of Domicile and a Probate Affidavit of Domicile. The Non-Probate Affidavit of Domicile is used by individuals to establish their domicile in Massachusetts for estate planning purposes and is not required to be filed with the court. The Probate Affidavit of Domicile is used to establish the domicile of a deceased person and must be filed with the court before any probate proceedings can begin.