The tenant didn't do anything wrong and is totally legit, the PM also sounds like they were somewhere within the bounds of reasonableness but possessed poor communication skills.

He may be legit, he may not be, I'm not going to comment on that because I don't know anything about him.  

You know, in case you're in a life-or-death emergency wherein you need to quickly evaluate if that mattress store's 0% interest rate offer is legit or not based on the presented monthly payment.

Well, it's a legit letter from my bank. 

So hard to find legit lenders these days!

Since I never got the employment or rental verifications back no way to tell how legit they were.I think you're right about the application review process, though I think it's cleaner to do first come/first reviewed from a liability perspective.

I've had to use Chicago title on a REO at one point and I remember they were legit, but low end  and messed up a little due to some incompetence, but not deceit.  

The tenant sent me a letter with a copy of a cleaning receipt, saying that he hired a cleaning company (which I am familiar with and know to be legit) upon arrival and that it was unnecessary to withhold a portion of his security deposit for deep cleaning and pet stains.

There are if by reliable you mean legit, then the first three on your list are legit.

These are very good leads as long as the tax bill is not crazy high.Your best bet is to get a legit skip tracing software.