FAQ: Can I tell people where to buy a license from?

Yes.

When you protect files you can add a free format text message to it.

You might want to enter information on how to purchase if you are selling documents or give details on contacting your administrator if the system is used for internal document control.

This text is shown when a customer opens an unlicensed document.  The text is also visible at the top of the document if they try to open it with a text editor or a similar application such as Notepad or MS-Word.