I know that there are some services that will take your personal information and not share it but hold it after verifying it and then vouch for you when a provider calls them to check you  out.  I've never used one of these services because I've not found most screening to be too odious but I know some people do.

I don't know if the girls have to be members of the service to check you out thru them but I'm sure that info is available.

Suggest you jump on www.roomservice2000.com and see what you think.

Does anyone out there have other 411 on this kind of service?

Everyone's privacy is very important. However, I think providers are more vulnerable than hobbyists most of time. Because we're women. For the hobbyist, privace should be protected, but for the providers, our lives. Some people think providers are easy to deal with because we exchange our fresh with dinero.
But everyone has own integrity and every single provider has own reasons to be in this business. Providing is the way to make a living, or more, or less, but rape is humiliating. One of my dearest friends became disable because someone stabbed on her pretty face. For me, I don't want to harass people when I screen them either. I always give them alternative if they don't want to provide their personal information. I ask them if they have any references instead of their SSN. So if you're the one who's usual go to see independents, it would be helpful to keep good relationship at least with one provider, if you're the one who's for agencies, you probably keep agency name and number in handy. If you're the first time hobbyist, you must go for agencies. So seems like everybody can be happy-go-lucky now.