premise: 5. Upon the written request of the Disclosing Party with respect to any Confidential Information disclosed by it hereunder, the Recipient Party shall return to the Disclosing Party any or all of such information and all copies, contracts or other reproductions in whole or in part thereof or, with the written permission of such Disclosing Party, effect the destruction of all of same and certify such destruction in writing to the Disclosing Party.