Hi Katten,

The best solution is to limit your own font usage to those fonts that you can be confident exist on all of your client's computers. Font embedding generally works OK, but:
• it increases the file size for every such document; and
• some fonts have licensing restrictions that Word will respect, prohibiting embedding.
As replacement font rules are not controlled by Word, but by the OS on which the document is displayed, you could only achieve your own substitution via a macro (which may or may not be able to run on the client's PCs) that tests what fonts are available.

Finally, you need to be aware that, even if everything's OK with the fonts, you still don't have complete control over the document's layout as Word uses information from whatever printer drivers are used on the host PC to do the layout. Amongst other things, this can result in different pagination.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]