Good points JB that I overlooked. If you type in a search with the provider's name and phone number with no results, that's the definitive warning sign the ad is fraudulent.  A legitimate provider leaves a trail on the Internet with ads in other sites. The photos in those phone only Eros ads just look phony to me. Always a twenty something hottie in professional style settings. Never a selfie in bad lighting. The con artists give themselves away.

Relaying my recent experience, for what it is worth.  Yesterday I texted to the number in her Eros ad, asking for an appointment.  It was a short notice appointment request after another appointment I had planned on for that evening fell through.  I received a response immediately, quoting the donation rate and indicating the location in downtown DC.  

We agreed upon a time, but immediately afterwards started to worry about the fact that no screening or verification of any kind had occurred.  I soon sent another text apologetically asking if we could do some sort of verification first.  I offered to send my P411 account info for her to verify me, and asked if she had anything similar by which I could verify her.  If not, I asked whether she could send a pic of some kind to verify that she is indeed the person in the ad.  

At this point I received no reply.  After waiting a reasonable amount of time, I texted back saying (politely) that I was cancelling because of the lack of a verification step, and apologized for any inconvenience.  Well, about 8 hours later in the middle of the night (many hours past the appointment time), I received a text from her that was a selfie of her from a hotel room, with a message saying it was my loss and that I was now on her black list.

I texted back saying thanks but given the unwillingness to do verification before the appointment, I felt like I had dodged a bullet.  She texted back saying I was a time waster and that she was a reality TV star who does Facetime with clients and doesn't use a "whore" website like P411.

Ok so, maybe she is for real.  The fact that she eventually produced a selfie says something, though I wouldn't consider that to be foolproof.  I still think I dodged a bullet however, as she (or whoever I was texted with)  were fairly unpleasant to deal with in the end.  Perhaps others will have