Public communications funded by political committees are required to feature a disclaimer indicating the name of the committee that funded the communication[1]. Outside groups and individuals funding a public communication are required to include a disclaimer if the communication is express advocacy.
A message funded by a candidate campaign committee must indicate which committee paid for the communication. (Example: “Paid for by the Smith for Congress Committee”)
A message authorized by a candidate (coordinated), but not funded by the candidate’s campaign committee, must acknowledge the candidate’s authorization and indicate who funded the message. (Example: “Paid for by the XYZ State Political Party and authorized by the Smith for Congress Committee”)
A message not authorized by a candidate (independent) must indicate which group funded the communication, provide the group’s address, telephone number or website address and acknowledge that no candidate authorized the communication. (Example: “Paid for by XYZ PAC (www.XYZ-PAC.com) and not authorized by any candidate or candidate’s committee”)
Disclaimers on print materials must be placed in a printed box and be clearly readable. It must appear on the front page of single sided documents and billboards. For formats no larger than 24 inches by 36 inches, size 12 type size is considered clearly readable.
Radio advertisements must contain the name of the political committee or person responsible for the communication. (Example: XYZ is responsible for the content of this advertising)
Television advertisements must contain “a "full-screen view of a representative of the political committee or other person making the statement," or a "voice-over" by the representative.”
[1] "Quick Answers-General Questions." Federal Election Commission. Web. 11 Dec. 2011. <http://www.fec.gov/ans/answers_general.shtml>.