Copies of PS Form 3624, Application to Mail at Nonprofit USPS Marketing Mail Prices, and PS Form 3623, Request for Confirmation of Authorization (or Pending Application) to Mail at Nonprofit USPS Marketing Mail Prices, are available for customers and employees on the Postal Service internet at http://about.usps.com and also through Postal Explorer at pe.usps.gov/, as well as in print at many Post Offices and business mail entry units.
