Can I re-authorize recipients using my mobile device? Catherine McAdam October 04, 2023 18:17 Updated Follow You can open app.earthclassmail.com in your mobile browser to re-authorize recipients. For best experience use a full web version of the app. Related articles Who is required to complete re-authorization? How to re-authorize recipients if you created an account before August 2022? How to transfer recipient? How to re-authorize recipients if you created an account after August 2022? What is a U.S. Postal Service (USPS) 1583 Form, and why do I need to complete one?