Legally, they'd have no grounds, but when it comes to pissing off a customer, sometimes legal grounds are irrelevant. 

I asked their customer service and got this response "yes we can provide taxdelinquent information for Washington county in Oregon."

A good company with a knowledgeable customer service department can potentially save you a load of money and avoid IRS problems.

You need to protect the rights of all of your apartment complex customers.

It may be the local custom, and probably will be called for in most sales transactions/purchase agreements that involve a Realtor (mostly so they know you're serious), but they are not legally required. 

@Amanda MuellerAppreciate the encouragement!

That lead him, with our encouragement, to get a better job so he could afford the "fun things in life".

@ TomHi Tom, It sounds like you're getting a lot of encouragement and support which is great since I'm in the same boat as you, but even older.

The area has a lot of custom, older, and non track home type homes so the values you might get on appraisal range could drastically vary.

I checked out your profile very encouraging.