Washington, D.C.—The Federal Trade Commission has released new truth-in-advertising guidelines for mobile advertisers, requiring companies to make sure that mobile users can easily view any disclaimers.

The FTC's .com Disclosures now require that terms, conditions and disclaimers be viewable on mobile devices' smaller screens. This may require revamping websites originally tailored for desktop viewing, the FTC said.

“Among many other considerations, if a disclosure is too small to read on a mobile device and the text of the disclosure cannot be enlarged, it is not a clear and conspicuous disclosure,” the FTC said. “If a disclosure is presented in a long line of text that does not wrap around and fit on a screen, it is unlikely to be adequate."