Michigan Compiled Laws, Chapter 700. Estates and Protected Individuals Code § 700.7507

Sec. 7507.(1) Whether or not a trust contains a spendthrift provision, a creditor or assignee of a trust beneficiary may reach a mandatory distribution of income or principal, including a distribution upon termination of the trust, if the trustee has not made the distribution to the trust beneficiary within a reasonable time after the designated distribution date.

(2) As used in this section, “mandatory distribution” means a distribution of income or principal that the trustee is required to make to a trust beneficiary under the terms of the trust, including a distribution upon termination of the trust. Mandatory distribution does not include a distribution subject to the exercise of the trustee's discretion even if either of the following applies: