RSA 463:6 Notice.

I. After the filing of a petition, the court shall set a date for a hearing, and issue orders of notice in reasonably understandable language. The orders of notice shall be sent by certified mail, return receipt requested, to both parents of the minor and to any person or persons alleged to have had principal care and custody of the minor during the 60 days preceding the filing of the petition, and by first class mail to:
(a) The minor, if 14 years of age or older and not the petitioner.
(b) The person nominated in the petition to be the guardian.
(c) Any person named as a testamentary guardian of the person or of the estate or of both of the minor in the will of a decedent parent.
(d) The department, if the petition identifies any juvenile proceeding