Please follow the following steps before you submit your files.
Fonts must be embedded in PDF files. (Some fonts have copyright restrictions and will not embed in PDF Files.)
Embed all images and outline text in Illustrator files.
Quark Express: Fonts and images must be included with all files submitted. (Mac only)
Flatten all layers when working in Photoshop.
When creating a file with a vector-based software such as Illustrator, follow these steps to outline fonts:
Select “Type”
Select “Create Outlines”
When trying to outline fonts in Photoshop, simply just flatten the image.