39 U.S.C. § 1002: Political recommendations

any Member of the Senate or House of Representatives (including the Resident Commissioner from Puerto Rico); any elected official of the government of any State (including the Commonwealth of Puerto Rico) or of any county, city, or other political subdivision of such State or Commonwealth; any official of a national political party or of a political party of any State (including the Commonwealth of Puerto Rico), county, city, or other subdivision of such State or Commonwealth; or any other individual or organization. shall not solicit, request, consider, or accept any such recommendation or statement; and shall return any such written recommendation or statement received by him, appropriately marked as in violation of this section, to the person or organization making or transmitting the same. A person who requests or is under consideration for any such appointment, promotion, assignment, transfer, or designation is prohibited from requesting or soliciting any such recommendation or statement from any person or organization except a statement of the type referred to in subsection (e)(2) of this section. Each employment form of the Postal Service used in connection with any such appointment, promotion, assignment, transfer, or designation shall contain appropriate language in boldface type informing all persons concerned of the provisions of this section. During the time any such appointment, promotion, assignment, transfer, or designation is under consideration, appropriate notice of the provisions of this section printed in boldface type shall be posted in the post office concerned. the statement is furnished pursuant to a request or requirement of the Postal Service and consists solely of an evaluation of the work performance, ability, aptitude, and general qualifications of such person; the statement relates solely to the character and residence of such person; the statement is furnished pursuant to a request made by an authorized representative of the Government of the United States solely in order to determine whether such person meets the loyalty, suitability, and character requirements for employment with the Government of the United States; or the statement is furnished by a former employer of such person pursuant to a request of the Postal Service, and consists solely of an evaluation of the work performance, ability, aptitude, and general qualifications of such person during his employment with such former employer. The Postal Service shall take any action it determines necessary and proper, including but not limited to suspension, removal from office, or disqualification from the Postal Service, to enforce the provisions of this section. The provisions of this section shall not affect the right of an officer or employee of the Postal Service to petition Congress as authorized by section 7211 of title 5 .