premise: The Parties agree that if the negotiated transaction does not proceed within a reasonable time, or upon any request from either Party, each Party shall promptly deliver to the other Party all written Confidential Information and any other written material containing or reflecting Confidential Information and will not retain any copies, extracts or other reproductions in whole or in part of such written material.  All documents, memoranda, notes and other writings whatsoever prepared by each Party, or respective representatives, based on the information included in the Confidential Information shall be promptly destroyed, and such destruction shall be ce1tified in writing by an authorized officer supervising such destruction. 