I would call to verify someone's employment if there were not other options. But, like I said it would only be as a last resort. And I also would not see them on an employment check alone. It would be in combination with something else.
Provider refernces are easy and the best judge of someone and I'm sure most providers feel this way. Wo ever taught her to screen was full of BS and I just hope she doesn't end up hurt because of it.