Iowa Code Title XV. Judicial Branch and Judicial Procedures [Chs. 595-686] § 633A.2302. Spendthrift protection recognized

1. A term of a trust providing that the interest of a beneficiary is held subject to a “spendthrift trust”, or words of similar import, is sufficient to restrain both voluntary and involuntary transfer, assignment, and encumbrance of the beneficiary's interest.

2. A beneficiary shall not transfer, assign, or encumber an interest in a trust in violation of a valid spendthrift provision, and a creditor or assignee of the beneficiary of a spendthrift trust shall not reach the interest of the beneficiary or a distribution by the trustee before its receipt by the beneficiary.

3. Notwithstanding subsections 1 and 2, the interest of a beneficiary of a valid spendthrift trust may be reached to satisfy an enforceable claim against the beneficiary or the beneficiary's estate for either of the following: