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Appendix D
Application for Nonprofit Standard Mail Rates: PS Forms 3624 and 3623

Copies of PS Form 3624, Application to Mail at Nonprofit Standard Mail Rates, and PS Form 3623, Application for Nonprofit Standard Mail Rates at Additional Mailing Office, are available for customers and employees on Postal Explorer at pe.usps.com, as well as in print at many Post Offices and business mail entry units.

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