I've seen shops and shows advertising JSA/PSA appearances, and was wondering, if you bring an item to them for verification do they authenticate on site, ship it back to their offices, bring it to their offices, or advise you to mail it in? Or is it they'll look at it, and if they like it authenticate it on site or take it for further review if they don't? I've got this gronkowski helmet, with a COA and holo from sure shot promotions, as well as a Gronk holo, but would still like a professional 3rd party COA so that if at some point in the future he goes too Hollywood for his own good and bails on NE, and my brother winds up not liking it any more.