What can I reveal as reason for denial?

[Michael Nahm]

I recently had to reject a potential tenant due Their credit report, specifically, a couple of accounts are in collections.

In the message I sent, informing of the denial, I simply wrote that the denial is having to do with their credit report.

The potential tenant sent a message claiming to have a stellar background.

My question is, whether I could (or should) provide the specifics and inform them of the accounts in collections or would that open up a new can of worms.

Any advice would be greatly appreciated.