ITU - refers to the intent-to-use filing basis provided for in Trademark Act Section 1(b), 15 U.S.C. 1051(b). Applicants who have not yet used (in commerce that can be regulated by Congress) the mark they wish to register may file a trademark application under this filing basis. An "intent to use" application must include a sworn statement (usually in the form of a declaration) that applicants have a bona fide intention to use the mark in commerce. A properly worded declaration is included in the trademark application form for registration. The applicant or a person authorised to sign on behalf of the applicant must sign the declaration.

Applicants who file based on "intent to use" must begin actual use of the mark in commerce and file an Allegation of Use before the USPTO will register the mark. See definitions of "Amendment to Allege Use" and "Statement of Use". There is an additional filing fee for the Allegation of Use.