I'm guessing they just don't meet the profile the bureaus want to see.

I think Experian or one of the credit bureaus anyway, will analyze your credit score for you live on the phone for a fee.  

Notification of credit bureaus causing inability to qualify for lines of credit, including credit cards, car loans, and mortgages.

The other two bureaus don't accept rental history because they don't trust the data. 

And, if you want to report them to the credit bureaus, you must have their SSN.

It's run by one of the credit bureaus.  

In theory, they'd all end up pretty thorough, but it's possible one service would show it and another wouldn't - just like the credit bureaus.  

I know in MA at least, judgements for $$ are automatically reported by the court to the credit bureaus and there is a public list online of every eviction and its updated fairly regularly and searchable for free.

And if they fail to do this, and it results in unpaid utility bills that become yours, that the manager must pay them.By the way, I believe you can just use a collection agency for the utility bills you got stuck with (if you don't just deduct them from the deposit), and they will report to all three bureaus. 

Since most responses are already in these two buckets, I'll rephrase my ask: How are you landlords reporting delinquincies to the credit bureaus?