My last job was a scheduled 135 gig that I only did for about 4 months before getting hired at my current job. I wasn't under a training contract, I got along with everyone, I gave them two weeks notice, and the chief pilot even wished me the best of luck on my last day when I turned in my badge. However, when the PRIA stuff came back from them there was an HR paper in there and they had checked a box saying I wasn't eligible for rehire with a comment underneath saying something about how no one who resigns voluntarily is eligible for rehire.

Kind of a dumb policy for a company but, hey, that's their business. My current employers didn't say anything about it.