That was a few years back when another well-known registrar only required the last 4 digit of the customer's credit card, and would even help them guess if they

That was a few years back when another well-known registrar only required the last 4 digit of the customer's credit card, and would even help them guess if they didn't remember. I sent the ids by fax (yeah a few years back, I still had a fax machine). I thought asking for id's + phoning on the number listed in the whois database was a good cross check, especially back then.