Legal Question in Family Law in Massachusetts

If ex-husband has custody (which I think is what you said), any case relating to custody must be brought in New Hampshire. I have heard through past clients that New Hampshire requires a certified copy of all of the docketed documents to proceed, and I confirmed that in the involved court myself. In the long run, the cost of copies is well worth it if you can save on attorneys' fees later on.

Child support and related issues like medical insurance remain in Massachusetts, but you may be able to transfer them to New Hampshire to consolidate them. You will need too discuss this with New Hampshire counsel. I am not sure off of the top of my head that you can do this without the ex's agreement, but I think that you can because he and the children are there. The point of this would be to consolidate all of your modification and contempt actions in new Hampshire and open up your choice of attorneys.

As for dual-state practitioners, your quickest route is to look in phone books and on the internet for attorneys in the border cities and towns. Those are often licensed in both states to take advantage of their "geographic draw."