You and your partner must be able to truthfully state an identical residential address on the application form for the Domestic Partnership. Establish emotional and financial security before you move in together and combine your assets with a Cohabitation Agreement.While the marriage license application can be started online, both parties MUST be present in our office in order to complete the application process. At or before the court hearing on this petition, you must provide to the court a completed (filledin) order for the judicial officer to sign. Complete the Affidavit of Domestic Partnership Registration or pick one up in the Legal Division of the County Clerk's office at 110 Dr. Martin Luther King, Jr. Rule No. Form No. Source. Explore common law marriage in California: understand legal rights, property division, parental rights, and financial implications for unmarried couples. Our easy online Cohabitation Agreement form takes minutes to complete. Protect your interests today. Live together: The law presumes that a married couple lives together.