Trustee process is ancillary to the underlying action. See 6 Am. Therefore Herbert's attack on subject matter jurisdiction relates to the underlying action to enforce the California judgment. Whether a Maine court has authority to enforce an order to pay alimony depends on whether the plaintiff has a vested interest in the arrearage. All of the payments to Susan were due prior to her filing of the complaint in the Maine court, and thus she had a vested and absolute right to receive the payments at that time.
Maine courts do have the authority and the obligation to enforce a final judgment of a sister state.
U.S. Const. art. Herbert did not raise the issue of forum non conveniens prior to filing his appeal with this Court. Further, although Herbert claims that he is no longer a domiciliary of Georgia, he has not informed the Court where his current domicile is, nor has he suggested an alternate forum that is more convenient for him. Herbert's claim of forum non conveniens is not preserved. See id. at 107.