I was just wondering if anyone knows about registration for auction houses. I've only ever bid on coins through Heritage, but I would like to also bid through CNG and Bertolami. However, I noticed for the latter two that dealer/auction house references are required to get an account. I'm a little confused as to what this means. Do I need dealers/auction houses (which is currently just Heritage) to submit proof of my purchases or that I am a client? I believe Bertolami requires 3 auction houses which may be a problem for me (I only have 2, if I include my recent purchase at Stacks-Bowers store in NYC, which was not from their auctions). Your help is appreciated.