Based on the info I got from the folks on line on this website, I said the heck with it and sent everything in by registered mail. Sure enough they sent me a letter a few weeks later threatening to d/c me from future sales if I didn't send in an EUC.
My response was to send an email with proof of delivery. No answer. I waited for another two weeks.
Then I sent an email to DRMS-Battle Creek, MI with a cc to GL asking for the point of contact for the GL Contracting Officer Representative. This is the person that oversees the GL-Govt Contract. Needless to say I had an answer from GL within a few hours stating they had received my EUC and it was being processed.
I, like many others on this website, believe their service has something to be desired butI also fear what will happen without them.