The trustee is not subject to liability for doing so unless: (1) The trustee knows of a pending proceeding contesting the validity of the trust; or (2) A potential contestant has notified the trustee of a possible proceeding to contest the trust and a proceeding is commenced within sixty days after the contestant sent the notification. (c) A beneficiary of a trust that is determined to have been invalid is liable to return any distribution received for proper distribution. If the beneficiary refuses to return the distribution, the beneficiary may be liable for all costs, including attorney fees, incurred for the recovery of the distribution. (d) Notice given by the trustee, trust protector, trust advisor or settlor under this section shall be given to all beneficiaries of a trust and all heirs at law of the trust settlor. (e) With respect to notices to beneficiaries and potential contestants under this section, if personal service is not made, then the notice shall be mailed certified or registered mail, postage prepaid, to the last known address of the person, and absent evidence to the contrary, notice to the person is presumed to have been made on the date of delivery to the last known address of the person, when there is proof of delivery. (f) No trustee, trust advisor, or trust protector may incur any liability to any person or otherwise for failure to provide any written notice discussed above. (g) Any trustee, trust advisor, trust protector, or the settlor may petition the court for a judicial order confirming that a trust is valid and enforceable under its current terms, pursuant to the procedures as set forth in chapter 21-22 . (h) The provisions of chapter 55--18 apply to this section. Source: SL 2010, ch 232 , § 11; SL 2013, ch 239 , § 24; SL 2017, ch 204 , § 21; SL 2017, ch 208 , § 35.