My last two cents, (trying to be helpful and clear) which I guess my early posts weren't.
You need to determine if you legally own a legal font and if so what are its restrictions.
1) look at the license (even free fonts have licenses)
if you don't have a license for the font, don't use it. You have no proof you own the font.
If you do have a license, is the font restricted to non commercial use only?
if so, don't use it.
Embedding the digital font would be a copyright infringement, but you are not doing that so that is not an issue (my point in my first post)
2) If you do have a license for the font and it allows for commercial use,
You then need to determine if you legally own a legal font.
example 1, I upload a Adobe font (complete with license) for free download.
this is a legal font that you don't own legally. Don't use it.
Pretty easy to check, is the font a brand name font?
example 2. I take a Adobe font, modify it with Fontographer, change the name, put my own license on it and give it away for free.
This is an illegal font, and this was done a lot.
Adobe could go after me and you for copyright infringement.
This is also pretty easy to check, If a similar looking font is available from a major brand, the free font is probably a copy. Don't use it. (buy the version from the major brand)
If you do a font search and can't find a similar looking font for sale, (search for the "look" not the name) there is a good chance it is a legal font but still hard to determine if the original source is out of business.
Hope that helps.