Get legal advice before signing any agreement. Any part of the agreement that is about your child (child support, custody, visitation) can be changed later if you or the other parent can show that the facts have changed a lot. But there are complicated legal issues called "merger, survival and incorporation" that make a difference to whether you can change the other parts of your agreement later on.
Examples
If the agreement says it is "merged and incorporated and does not survive as an independent contract," you can try to change it later if you can show the court that facts have changed.
But if the agreement says it "survives as an independent contract," you cannot even try to change it later in the Probate and Family Court.
Ask for legal advice about "merger, survival and incorporation". Call your local legal services office to see if you can get free legal help. Or call a lawyer referral service to try to find a private lawyer to help you at a price you can afford.
Produced by an AmeriCorps Project of Western Massachusetts Legal Services updated and revised Massachusetts Law Reform Institute Last updated May 2010