Vt. Stat. Ann. tit. 12, § 2357

When the petitioner has been prevented from taking or entering an appeal in a probate proceeding by fraud, accident, or mistake, on petition and proof thereof, the Supreme or Superior Court in its discretion may grant leave to file a notice of appeal from an order, sentence, decree, or denial of the Probate Division of the Superior Court or from a determination of commissioners on the estate of a deceased person in those cases which are by law appealable.