Trademark applications may be based on either use or intent to use. A trademark application must indicate whether the application is based on use of the mark in commerce or intent to use the mark in commerce. A use-based application must include a specimen of use. A specimen of use does not need to be included (and is not logically possible to include) in an intent-to-use application. It is filed later, when the applicant files a Statement of Use or Amendment to Allege Use.