Common Law marriage was a convenience established for couples who did not have access to State official marriages in their rural area. It has been bastardized to join couples who have no desire to be married or so obligated. Good business for diverse attorneys. Very few States in the US continue to have Common Law statues. Probably a big reason we kicked the British out, who I believe invented the idea.Don't know how it is in the States but if they're together a year here, it's half each for everything.