If the borrower has defaulted on his or her promise to pay and if he or she has given specific notice in writing, by registered or certified mail, instructing the licensee to cease further contacts with the borrower in regard to the indebtedness, the licensee shall, after such notice, except as provided in sections 45-1047 and 45-1048, limit contacts to one notice per month by mail. No notice shall be designed to threaten action not otherwise permitted by law.