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:

Helpful articles on Font-Embeding:

Encapsulated PostScript (EPS) - A type of file format that is ideal for high resolution output because it contains all color and image data.

Many desktop publishing applications can create an EPS file from the native document using the File > Export or File > Save As function.

Because they are based on the PostScript language, EPS files can contain both vector and bitmap graphics. Since PostScript cannot normally be displayed on screen, the application creates a preview of the EPS file for on-screen display. If you print an EPS file to a non-PostScript printer, only this screen-resolution preview will be printed.

You can create an EPS from either the Macintosh or Windows platform, however the screen preview of the EPS file is platform-specific. When you place an EPS file without a preview image, Illustrator displays a box with an "X" to represent the EPS artwork. The preview of an EPS file does not affect the final output of the file, however it is necessary for placing EPS files in the newspaper’s pagination system. Create all EPS files with a preview in TIFF format.

Many of the latest versions of desktop publishing applications (InDesign, Pagemaker, Freehand) can embed fonts within the EPS file, making it unnecessary for you to supply them as separate files when you submit the EPS file for publication.

However, this is not true for all programs. QuarkXPpress for example, cannot embed fonts in the document without the use of additional extensions that must be purchased separately.

Many programs can create a report that contains information about your document and the fonts that it uses. This report often gives the information you need when supplying the fonts to us. If your program and/or current version does not present you with a dialog box to embed fonts, you must send the fonts along with your EPS document.

We prefer that you always embed the fonts used in your document. This way, we will have no trouble preparing your ad and we can ensure it will reproduce exactly the way you intended.