That which derives its force and authority from the universal consent and immemorial practice of the people. No. After established, a common law marriage is just as valid and binding as a formal wedding and marriage would be. It lasts until a court grants a divorce or one companion dies. States that did permit, and will still recognize as valid, widespread law marriages entered into prior to the date it was abolished. As attitudes about marriage are forever evolving a single issue remains correct there are advantages to becoming married and disadvantages to living with each other before marriage. If you have a question about the prevalent law marriage requirements in your state, speak to a loved ones law attorney for help.