Certain federal rules on charitable solicitations apply to charities and are enforced by the Telemarketing Sales Rule.

Title 16 Chapter I Subchapter C Part 310 § 310.3  

See the e-CFR for any updates.

https://www.ecfr.gov/current/title-16/chapter-I/subchapter-C/part-310/section-310.3

(d) Prohibited deceptive acts or practices in the solicitation of charitable contributions. It is a fraudulent charitable solicitation, a deceptive telemarketing act or practice, and a violation of this Rule for any telemarketer soliciting charitable contributions to misrepresent, directly or by implication, any of the following material information:

(1) The nature, purpose, or mission of any entity on behalf of which a charitable contribution is being requested;

(2) That any charitable contribution is tax deductible in whole or in part;

(3) The purpose for which any charitable contribution will be used;

(4) The percentage or amount of any charitable contribution that will go to a charitable organization or to any particular charitable program;

(5) Any material aspect of a prize promotion including, but not limited to: the odds of being able to receive a prize; the nature or value of a prize; or that a charitable contribution is required to win a prize or to participate in a prize promotion; or

(6) A charitable organization’s or telemarketer’s affiliation with, or endorsement or sponsorship by, any person or government entity.

[75 FR 48516, Aug. 10, 2010, as amended at 80 FR 77558, Dec. 14, 2015]