A Declaration of Domicile proves residency in Broward County, Florida. It is often used to enroll children or college students in school.Fill in your current address. A Declaration of Domicile is a document you file with the court to show that you currently live in Florida and intend to remain living in Florida. Next, provide your previous address and any other residence locations. A Declaration of Domicile is a legal document that shows an intention to make Florida your permanent and principal home. A Declaration of Domicile is a legal document that identifies your principal home in Florida, with tax and asset protection benefits.