Can debt collection agencies sell your info to a law firm?

Can a debt collection agency sell your info to a law firm in the state that you live in? That law firm acquires the debt and they win a judgment against you. Meanwhile, the law firm has paid their client the money before the judgment takes place. Technically, the collection agency has been paid in full by the law firm. The law firm wins the judgment and keeps the money that has been garnished from your wages. Can this happen?