Unlike a premarital agreement which is signed by the parties before they got married, a postnuptial agreement is an agreement entered into between a husband and wife during marriage. A postnuptial agreement must not violate public policy. Also, a party cannot waive alimony in a postnuptial agreement unless it is a separation agreement. A husband and wife living together and not contemplating imminent separation that purports to quantify or limit the duty of support is void as against public policy. Family law attorney Scott Allen has drafted and litigated about postmarital agreements and has over seventeen years of experience. If you have questions or need assistance call him at (919) 863-4183 or email at email@example.com.