Probate and Family Court forms for modifications. A collection of court forms used to request to modify child support and custody.Check your local Probate and Family Court to see if this kind of assistance is available. At trial, you'll have to show why it is in your child's best interest to move so far from Massachusetts and her other parent. Edit, sign, and share change venue application online. No need to install software, just go to DocHub, and sign up instantly and for free. In general, all you would have to do is write a letter explaining the basis for your request for more time. Still in effect (examples: child custody, visitation (parenting time), child support, and other orders). A motion for a change of venue is a legal request for a party to transfer the case from one location to another. However, if circumstances change, the court can modify the order at any point until the child turns 18.