Ariz. Rev. Stat. § 14-10505
A. Whether or not the terms of a trust contain a spendthrift provision, the following rules apply:
2. Subject to the requirements of this section, with respect to an irrevocable trust, a creditor or assignee of the settlor may reach the maximum amount that can be distributed to or for the settlor's benefit. If a trust has more than one settlor, the amount the creditor or assignee of a particular settlor may reach may not exceed the settlor's interest in the portion of the trust attributable to that settlor's contribution. This paragraph does not apply to any trust from which any distribution to the settlor can be made pursuant to the exercise of a power of appointment held by a third party or abrogate otherwise applicable laws relating to community property. A creditor of a settlor:
B. For the purposes of this section:
E. For the purposes of this section, amounts and property contributed to the following trusts are not deemed to have been contributed by the settlor, and a person who would otherwise be treated as a settlor or a deemed settlor of the following trusts shall not be treated as a settlor:
G. Subsections C and D do not apply to: