This form is a combined separation,. You should not use a separation agreement if you don`t know where your spouse is or if your spouse refuses to accept. Web marriage separation agreement (free forms and templates) the marriage separation agreement is a legal document used by married couples to outline how their assets,. A cohabitation agreement or a “common law partner agreement” is a written contract between unmarried couples who. A separation agreement keeps you separate, but still be married legally, hence it is very.