It's a huge opening to get sued. So you could lose millions, but it'll never make you a cent. So most are advised to just confirm very basic information like how long the employee worked there.
https://www.achrnews.com/articles/141319-what-can-i-say-about-former-employees
https://www.wsj.com/real-estate/commercial/thanks-to-big-data-landlords-know-how-to-squeeze-the-most-out-of-renters-eb7e5f02
https://www.housingwire.com/articles/yardis-rent-setting-software-illegally-drove-rent-prices-up-for-millions-of-renters-lawsuit/