They can clearly define their property rights and the arrangements that can be made for mutual financial assistance, debt management, child care, etc. A concubine agreement is essential to ensure that your common intentions to create a home together are enforceable and offer the protection you seek. Unmarried couples have not always had the opportunity to enter into contracts to provide some of the protection of marriage without actually getting married. As a result of some disputes in this area, it is fairly well established that there are three legal bases on which non-marital agreements can be founded. Property purchased during cohabitation – if you buy a property while you live with your partner and only one of you is mentioned in the agreement, this should be addressed in the same way as above. .