Yeah, nice story. I've felt some of this as I recently ...well okay, a year or so ago, got back into the arts. I had trained for 4 years before, but was treated at first differently by some of the more advanced students untill they learned, at times in sparring, that I wasn't quite a complete novice. I never hid my prior training, but the white belt was all they saw. In any rate, back to the first post, I think the piece of paper question depends on how it's done. A certification from a larger organization, has merit, and if the group has a history of being credible, then you should have met some real standards for the certificate. Does it make you better? No, but it shows you met a realistic threshold to achieve it. Think a degree on the wall. Can mean nothing or can mean much. Do you remember all/what you were taught? Well.....not always, but at least at some point you knew enough to get it. In my school, we're part of a small association (C & S Self Defense Association) that registers all black belt dans, and anyone can look them up to see if someone is legitimate. It even lists the disgraced ones who are no longer "certified".