Another landlord disclosing what I said in reference about tenant

[Ramona H.]

I’m in need of some advice from seasoned investors. I’m in Oklahoma and have two rentals. I gave a professional, honest, reference for a past tenant via turbo tenant. The landlord told the tenant what I said and the tenant called me freaking out. Is this legal? I know it’s not ethical but didn’t know if it was legal. Thank you in advance. 

[Cassi Justiz]

This is why we are seeing a lot of people no longer giving references for tenants. Our "reference" for past tenants are lease dates and rent amount, whether tenant paid rent on time, gave appropriate notice prior to moving out and/or received their security deposit back. Anything else could be considered an opinion and I don't want to be involved in "opinions."