A couple of years ago, I was responsible for employing somebody and taking up her references, initially by phone and later by letter.
I spoke to her last boss on the phone and he told me something I don't think he should have: that she had been in a relationship where she had been beaten up, but was now stable and happy.
I was very startled that he divulged this info to me, as I didn't feel it had any relevance whatsoever to her fitness for the job and I felt quite uncomfortable that I knew something so intimate about her that she presumably wanted to move on from and that was frankly none of my business.
Now she's changing jobs again and has e-mailed me asking for a reference and she is going to ask him for one. My dilemma is, do I tell her that he told me about her previous relationship? For me, it didn't affect my decision at all - but somebody else might have some kind of peculiar hang-up about it and I suppose it could affect whether she gets a job or not. OTOH, maybe as it's now so long ago, her previous boss wouldn't mention it to another person and I should let sleeping dogs lie and not upset her.
What would you do?