Publication 417, Nonprofit USPS Marketing Mail Eligibility: Nonprofit and Other Qualified Organizations > 5 Cooperative Mailings
The cooperative mail rule applies to all mail entered as Nonprofit USPS Marketing Mail, with the exception of certain fundraising mailings. The scope of this exception is discussed in 5-2.
A cooperative mailing is a mailing produced by an authorized organization that “cooperates” with one or more organizations to share the cost, risk, or benefit of the mailing. Cooperative mailings may not be entered at the Nonprofit USPS Marketing Mail (nonprofit) prices unless all cooperating organizations are authorized to mail at these prices at the Post Office of mailing.
Furthermore, the cooperative mail rule prevents authorized organizations from sharing their authorizations with others who are not authorized. The rule restricts Nonprofit USPS Marketing Mail mailings to the authorized organization’s own mail.
