When calling work, they just call a coworker make up an inquiry and then tag on a "Is so-and-so in your office? I need to call him but I lost his extension, if you don't mind giving it to me." This is to make sure that the client didn't give us a fake name.
If it seems excessive, don't see escorts that require that much security. It hasn't hurt me any.
The references are more like "So and so really saw me, is probably not a cop, and isn't a jerk."