Both of you have a close and committed personal relationship, live together, and have been living together on a continuous basis. All documents submitted for proof of cohabitation must be at least six months old as of the date you submit this form.This affidavit documents the cohabitation of a couple for over six years without being legally married. Proof of Cohabitation. Drafting a cohabitation agreement. It requires an affidavit of cohabitation if you have a roommate, but if like me, you don't, you have to submit an affidavit that you live alone. An Affidavit of Cohabitation is necessary for couples who wish to get married without securing a marriage license. Log in to your account. Sign up with your email and password or create a free account to test the service before choosing the subscription. Present the marriage application with just your information filled in on the document.