which one do providers prefer or are they all the same?

I do not like third part verification services. You are better served asking girls you have seen to white list you. It is safer for you too because you do not have yet another place to put a credit card down with your info.

Also reviewing who you see establishes credibility. Many of you do not want to do this but it is a heck of alot safer to post a FANTASY fictional review them to smack down a credit card to multiple places.

Also only see well reviewed providers. Stay safe out there. Hope this helped.

You can check for more details on the Newbie board, but I've found that both touring and local ladies around here tend to accept Date-Check.  P411 seems to be more of a Texas and southern thing, but I've seen it accepted by locals too.

RS2K is more of a midwestern thing, I think.

prefer third party verification and sometimes references as well.  This is their prerogative, and I fully resepct that.

I am a member of Date-check, and it's almost always worked, though I offer references if requested.

IMO, Datecheck has worked better than TER whitelist.