Kindly fill out and sign the highlighted portions of the authorization letter. Please return the authorization letter using one of the below methods:.(7) To correct typographical or other minor changes in the Discharge Approval. If you have trouble opening a form, right-click on the form link and choose "Save link as…" and download the form to your computer. Method: Mail Pick up Fax. § 309-7 Multiple canvassers. Ferraro explained the Telecommunications Act and the letter of authorization that is a Power of Attorney for the work being proposed.