(a) Notice of the initiation of proceedings to exercise a power of sale in a mortgage, security deed, or other lien contract shall be given to the debtor by the secured creditor no later than 15 days before the date of the proposed foreclosure. Such notice shall be in writing and shall be sent by registered or certified mail or statutory overnight delivery, return receipt requested, to the property address or to such other address as the debtor may designate by written notice to the secured creditor. The notice required by this Code section shall be deemed given on the official postmark day or day on which it is received for delivery by a commercial delivery firm.

(b) The notice required by subsection (a) of this Code section shall be given by mailing or delivering to the debtor a copy of the published legal advertisement or a copy of the notice of sale submitted to the publisher.