Ariz. Rev. Stat. § 43-1181
B. To qualify for the credit:
2. The real property and improvements must be conveyed unencumbered and in fee simple, except that:
I. If the donee is a school district:
J. If the donee is a charter school:
1. The charter school shall:
(b) Notify the sponsor by certified mail, and the sponsor shall notify the state treasurer, in the event of the charter school's financial failure or if the charter school:
3. A tax credit under this section constitutes a lien on the property, which the donor must record along with the title to the property to qualify for the credit. The amount of the lien is the amount of the allowable credit under this section, adjusted according to the average change in the GDP price deflator, as defined in section 41-563, for each calendar year since the donation, but not exceeding twelve and one-half percent more than the allowable credit. The lien is subordinate to any liens securing the financing of the school construction. The lien is extinguished on the earliest of the following: