premise: In that case, or at any time upon the request of either Disclosing Party for any reason, each Receiving Party will promptly deliver to the Disclosing Party or destroy all written Evaluation Material (and all copies thereof and extracts therefrom) furnished to the Receiving Party or its Representatives by or on behalf of the Disclosing Party pursuant hereto and such destruction shall be certified in writing by an authorized officer supervising such destruction.  In the event of such a decision or request, all other Evaluation Material prepared by the requesting party shall be destroyed, no copy thereof shall be retained and such destruction shall be certified in writing by an authorized officer supervising such destruction, and in no event shall either party be obligated to disclose or provide the Evaluation Material prepared by it or its Representatives to the other party. 