FACT – Since collection agencies work on a contingency basis, they should be paid a percentage of every dollar they collect on your behalf.  If you have a legitimate reason why you don’t think your agency should get paid on a certain charge that is being added to the account you would need to negotiate that prior to engaging the agency for the account in question.
See our section above on “contract” as some less reputable agencies will insert unfair language into their contract that legally binds you to a cancellation fee even if the agency has no prospect for payment.