The sample acknowledgement letters for receipt of payment provided below can be used as format templates for official and personal purposes. To confirm receipt of any request submitted, call .How to write an Acknowledgement Receipt Letter? Within 30 days you will receive an email acknowledging receipt of your claim form with additional information. Thank you for your prompt payment. I am being asked to sign the Receipt of Beneficiary BEFORE receiving the Final Distribution. Is this the proper procedure? Authorization Letter​​ Thank you for contacting PHX Customer Service. All letters of authorization are accepted online at MyPHX311. Get your questions answered about Federal Student Aid at University of Phoenix.