Like all contracts, a concubine`s contract must meet certain basic legal requirements for a court to enforce its terms. As these requirements are not explicitly clear in all countries, you should speak to a lawyer near you if you want to make a deal. While a large majority of states allow concubine agreements, some states are less than clear about their legality. You don`t need a lawyer to make a concubine agreement. But it`s a very good idea for each of you to get your own legal advice before signing one. Married couples will benefit from an equal division of 50-50 of their property (net family patrimony) when the relationship ends, but couples concubant will not benefit from the same guarantee under Ontario law. A common law spouse might try to enforce a common law to get a share of his or her partner`s wealth, but there is no guarantee that he or she will get it. To avoid the difficult financial implications in the event of separation, it is a good idea to establish a concubine agreement. It looks like a marriage contract, but does not require both parties to be legally married. This serves to protect each party`s fortune and make it easier to divide everything at the end of the relationship. A concubibinage agreement is a written document that you and your common law partner can create before or during your life together. It`s a kind of domestic contract that tells how you`re going to handle problems while you`re together or at the end of your relationship. Common law partners generally do not share ownership when they separate.