Fonts not from Monotype
This checks whether fonts used are not from Monotype Fonts
Using a font management system such as Monotype Fonts helps ensure that all fonts used will conform to arranged licensing agreements. Monotype Fonts integrates with InDesign and simplifies and secures the management of fonts and font licenses.
This check will flag any fonts present in the document which are not from Monotype Fonts and potentially contravening licensing agreements as a result.
Use InDesign Font menu > Find/Replace Font to quickly check which fonts your document is using and to change from one format to another. Select Redefine Style When Changing All to ensure your Paragraph and Character Styles are updated accordingly:
Further information on Monotype Fonts