Photoshop :: Editing A Scanned Document

I'd like to Edit a document that's being scanned from a scanner (Epson cx5000 all in one printer)

More specifically i want to edit the text on the document. I know about OCR software and how it will convert the image into editable text in like MS word and what not, but that's not really what i need to do.

i need the document text to look exactly the same after the edit as it does from the scan, if you know what i mean.

I'm editing a certification. I lost my OC cert (oleoresin capsicum, commonly referred to as "Pepper Spray." you only need to be sprayed with it once in your life (so long as you have the cert); and I'm absolutely not about to get sprayed again, as I'd probably rather shoot myself in the leg.

I have another person's cert that i can scan, i just need to change the date and name on the cert.

I'm not having much luck getting the edited version too look right though. The text looks too sharp compared to the other text; matching fonts is proving tricky, and when printed off, the area that's edited looks "whiter" than the areas not edited.