Publication 417, Nonprofit USPS Marketing Mail Eligibility: Nonprofit and Other Qualified Organizations > 1 Introduction
Reduced prices for USPS Marketing Mail postage are available for eligible organizations that the United States Postal Service (USPS) has authorized and whose individual mailings meet the specific eligibility rules that apply to Nonprofit USPS Marketing Mail.
The U.S. Congress authorized these reduced prices in 1951 and determined the categories of organizations eligible for these prices (see 2-2). Subsequent legislation extended the privileges to other categories and added restrictions on what material may be mailed at the Nonprofit USPS Marketing Mail (nonprofit) prices.
