What our lawyer said was, "You have no legal obligation to respond to any inquiries about tenants. In order to avoid the unlikely possibility of defamation claims by former tenants, I encourage a policy that limits responses to inquiring prospective landlords to:
1. that the tenants was a resident at your property;
2. the dates of residency;
3. whether rent was timely paid; and
4. whether the tenant was evicted.
The truth of all these facts are easily confirmable from the tenant file.
All other inquiries should be ignored. It can be explained that it is [the company's] policy to limit information to the above listed information."
We just look for two questions to be answered on our sheet: "Would you (if they qualified) rent to this person again," and "Did they leave any damages?" Everything else is gravy. Or icing. I don't know what kind of food additive, but it's extra that would be nice but not essential.