Warning: like so many laws this area of law is constantly changing.  It is your responsibility to confirm the latest version of the law.
ARS Section 33-811(B) provides that a Trustee shall execute and deliver the trustee’s deed to the purchaser within seven business days after receipt of payment by the trustee in a form that is satisfactory to the trustee.
ARS Section 33-810 (E) provides that the if the trustee’s deed is recorded in the county in which the trust property is located within fifteen business days after the date of the sale, the trustee’s sale is deemed perfected at the appointed date and time of the trustee’s sale.