If you are sending us your files electronically - PLEASE FOLLOW THE INSTRUCTIONS TO INCLUDE YOUR FONTS
There are links below to assist you in correctly embeding your fonts with your artwork/layout
Chances are the fonts may be embedded, but Illustrator may report them as missing (if they are not on the local machine).
If you are having problems suppling the fonts, you have another option:
open the file:
go to - text > create outlines - and save
By using these instructions, there will be no fonts included and no need to supply them - all fonts will be converted to artwork.
Helpful articles on Font-Embeding: