Русско-англо-русский юридический словарь

Although the terms common-law wife or husband are frequently used to describe a couple who live together, these relationships do not have legal recognition. (citizensadvice.org.uk)

Legal recognition of some status or fact in a jurisdiction is formal acknowledgement of it as being true, valid, legal, or worthy of consideration and may involve approval or the granting of rights. (Wikipedia)

Currently, transgender people who do not identify as male or female have no legal recognition of their gender. (BBC News)