Thanks for the quick response Acidic!

The site is for within the intranet and we also have the liberty of assuming the browser to be IE (We're blessed!)

I can't expect the security settings to be reduced though. I am looking at some Javascript code that will either help me loop thru the available fonts on the client machine or that will tell me if the barcode got written on the browser.. maybe some sort of a work around...

We have an option with the WEFT, worst case. If that ain't accepted then I'm gonna propose jus this:
"The best thing might be for them to check it themselves. Write out the alphabet in that font, and just below have an image of what it should look like in that font. They can then see if those match and if they don't then they have to download the font."

Thanks again!
Jemima.