Русско-англо-русский юридический словарь

A legal separation is an arrangement in which a married couple lives apart but remains legally married. It can be either mutually agreed upon or ordered by judicial decree. (Legal Information Institute)

"And it is further mutually agreed that either of the parties hereto may terminate this agreement at any time by giving the other party notice thereof in writing by mail, and any indebtedness then owing by either party to the other shall thereupon be and become immediately due and payable." (Justia U.S. Law)