AustinEscorts,
Before I even consider saying a a peep about a client I've seen, I verify that the provider is indeed legitimate. I check out her website: is it up to date with contact information, photos, content? Is it professionally done or just a blank escort template page? Does she have reviews or some other kind of web presence? Can I find her by googling her? If so, does the address or phone number pull up anything sketchy?
When I ask for a reference I always try to preface the communication with the aforementioned information; I find it helps make things a little easier on the provider who is doing me a solid by supplying the reference. That's what I do for every single reference, whether I'm asking for one or giving one. Any respectable provider will tell you the same thing.