RSA 564-B:4-406 Validity of Trusts.

(a) A trust is void to the extent that it was not validly created in accordance with this chapter or its creation was induced by fraud, duress, or undue influence.
(b) A person may commence a judicial proceeding to contest the validity of a trust within the earlier of:
(1) in the case of a trust that was revocable at the settlor's death, 3 years after the settlor's death;
(2) in the case of an irrevocable trust, including a formerly revocable trust that has become irrevocable, 3 years after the trustee sent to the beneficiary a notice described in RSA 564-B:8-813(c)(3); or
(3) in the case of an irrevocable trust, including a trust that was revocable at the settlor's death or a formerly revocable trust that has become irrevocable, 180 days after the trustee se