Wyo. Stat. § 4-10-508: Overdue mandatory distribution.

(a) In this section, "mandatory distribution" means a distribution of income or principal which the trustee is required to make to a beneficiary under the terms of the trust, including a distribution on termination of the trust. The term does not include a discretionary distribution under W.S. 4-10-504.

(b) If the trust includes a spendthrift provision, a creditor or assignee of a beneficiary may not compel a mandatory distribution or attach a mandatory distribution until it is received by the beneficiary.

(c) If a trust providing for a mandatory distribution does not include a spendthrift provision, a creditor or assignee of a beneficiary may compel the trustee to make the mandatory distribution to the beneficiary where the distribution was not made within a reasonable time.