I agree with the previous answer. Realize that a "charge off" is an accounting entry for the creditor. it does not mean that the debt has gone away or that the creditor or a collection agency cannot try to collect the debt from you.
When a creditor charges off a debt, it only means that the creditor is no longer reporting that as a performing loan or an asset on its books. It has nothing to do with your liability on the debt.
This general response is not intended to be legal advice because I don't have all the facts. The particular facts in each instance will change the recommendation significantly. Any statements made in your posting on Avvo are not protected by the attorney-client privilege because they are shared with third parties. I require a written contract for legal services, so an attorney-client relationship may not be presumed merely by my response to an Avvo posting.