Please keep in mind that this sample affidavit contains suggested language. Laws, cases, and web sources on domestic partnerships and other legal issues affecting unmarried couples.Download the Domestic Partnership Registration Form from the City's website and fill it out with a black pen as clearly as you can. Each partner must sign the form in the presence of the Notary Public. c. The Notary Public will complete the section titled "The Commonwealth of. Massachusetts. Me and my partner have been together for five years. We want to get married, but not until later in life once we have a house and children. The affidavit requires essential information, including both partners' full names, addresses, birthdates, and the relationship's start date. The parties must be at least 18 years of age. Can a notary assist a client in filling out divorce papers in MA?