As in the American jurisdictions that have preserved it, this type of marriage can be difficult to prove. It is not enough for the couple to have lived together for several years, but they must have been generally regarded as husband and wife. Their friends and neighbors, for example, must have known them as Mr. and Mrs. So-and-so (or at least they must have held themselves out to their neighbors and friends as Mr. and Mrs. So-and-so). Also, like American common-law marriages, it is a form of lawful marriage, so that people cannot be common-law spouses, or husband and wife by cohabitation with habit and repute, if one of them was legally married to somebody else when the relationship began.