A ll notices and other communications required or permitted under this Agreement (including the notice required by the definition of Good Reason as set forth in Exhibit  A) shall be in writing, shall be given by personal delivery, overnight delivery by an established courier service, or by certified mail, return receipt required, and shall be deemed to have been duly given when delivered, addressed   ( a )   if to Executive, at his address in the records of the Company, and if to ServiceMaster, to Servic eMaster Global Holdings, Inc. , 860 Ridge Lake Blvd., Memphis, TN 38120, attention Senior Vice President, Human Resources, or   ( b )  to such other address as either party may have furnished to the other in writing in accordance herewith.