Web what is a marital separation and property settlement agreement (msa) ? Why is a marital separation and property settlement agreement important? Although the document is legally binding, and in the case of uncontested divorce you likely agreed to all these terms, you may want these terms changed in the future. Web mat009 sample settlement agreement, divorce agreement, or separation agreement mat010 letter to client re: Web a divorce settlement agreement is a legal document that dictates how marital property is divided, child support and alimony, and other terms of a divorce.