If you are referring to the Fair Debt Collection Practices Act in your question, the answer is that it does NOT apply. The FDCPA applies only to actions of those collecting money for others.
Your state may have its own consumer protection laws that would apply to debt collection practices, so, focus your research there, or consult with a UT attorney.
I hope you found this response to be of assistance. This response shall not be considered the rendering of legal advise but instead a general response to a general question. While Avvo is a wonderful resource, nothing can be a substitute for an in-depth consultation with an attorney in the jurisdiction in which the law is to be applied. This response shall not be deemed to create an attorney-client relationship, nor shall it create an obligation on the part of the attorney to respond to further inquiry from the questioner.