Is it possible for a debt collection agency to charge interest on a non-interest-bearing account? I had been paying faithfully on a hospital bill that was turned over to collections for a reason unknown to me. The collection agency is now tacking on interest charges. I did not think that was legal, is it? I asked the representative about it and let him know that it wasn't something that I had ever heard of, to which he replied, "the law changed recently, I guess." I've searched online and have not been able to find anything in regards to any changes in Ohio's debt collection laws.