I agree, I worked accounts but only within the scope of "soft collections" As for charging interest rates, the provider can do that as long as he is within state law, your PM software should have this feature built in. Some states will have you call it "interest" with a max amount and others will have "late fees", etc.
Once the acct was recommended for collections, part of my fee included gathering what the collection agency needed and also weekly/monthly reports. I had a few clients that never even used a collection service, and while for the most part it worked out fine, there were always a few stubborn accounts that should have been sent. Collection services / agencies can do a bit more than the front end billing in regards to skip tracing, credit reporting, etc.
In some states, it's actually illegal to even "ACT" as a collection agency without a bond. At one point in my business I was going to get bonded and get collection software, Back then it would have been advantageous, .. I forget why I dropped the idea. I know finding a good software was costly and the bond back then in my state would have been $10K I was going to just start off with medical and my billing clients and later if the market proved to be good I would expand.
Linda Walker
PMRNC
www.billerswebsite.com