Some websites require uploaded PDF files to self-contain their fonts. You may see an error similar to:
attached PDF file references a non-embedded font:
*Helvetica-2509-Identity-H. Please remove file, embed the font and
This post describes how to create PDF files with non-embedded fonts using Microsoft Word.
In Microsoft Word press File, Export. This will show the "Info" screen.
Press "Create PDF/XPS"
Choose output directory and file name, then press "Options".
In the dialog box, choose "PDF/A compliant". Press OK.
Press "Publish". The PDF file will be created with all fonts embedded in the PDF document.