I got bitten by the "gotta scan the ID; FAX isn't good enough" thing, too, recently. The thing is, I tried very carefully to follow their instructions to the letter, and they said to FAX the ID in along with the rest of the EUC submission package. Grr. GL needs to update their instructions. Luckily I have a scanner.
I had to make some minor EUC revisions, too. When I asked, they said that it would be OK for me to scan/email the revised EUC instead of FAXing it. That was very helpful, because I don't have a land line at home. I'd either need to FAX it from work or go pay the local mailbox shops exorbitant rates to use their FAX machine.
I didn't bother with white-out; I had saved the PDF file from the original submission, so I just changed the entries in Adobe Reader. It wouldn't let me save the modified form (sigh), but at least it let me change some field entries and then print it out. So that I could scan it, and make another, much bigger, PDF file to email.
In GL's defense, they're probably so anal about the EUC because if they weren't, too many forms would be denied by .gov for silly things like having a blank field. While the EUC revisions seem frustrating, I think it would be a lot more frustrating (and a lot slower) if they went all the way to Battle Creek before some drone denied them. GL gives me plenty of reasons to complain, but in the case of the EUC process, they're not the ones setting the frustrating rules, and I think they're actually helping us by proofreading our forms and making us revise them until they're exactly what the .gov folks want to see.