Review the instructions and GTP 18-1 before completing the form. • Inspect the form and verify you have entered all of the required information.Empower a trusted representative with an Authorization Letter. Make a free Authorization Letter in minutes with our customizable template. Access to any necessary documents, data, or information that may be required to carry out the authorized tasks or actions. It is always important to add the date to your authorization letter to collect documents. Did you receive a letter or email from the Arizona Unclaimed Property Program? In the caption area, fill in the name of the decedent. 3. Call us at 1-800-772-1772 if you cannot provide these documents. The Delegation of Authority letter should accompany the financial instrument or permit application, etc.