premise: Recipient shall, upon termination of this Agreement, or upon written request of Discloser, whichever is earlier, immediately, but not later than 10 days after any notice thereof by Discloser, return (or destroy at Discloser’s option) all copies of such Discloser’s Confidential Information and certify in writing its compliance with this requirement, except that Recipient may retain a copy of such Confidential Information solely for archival purpose.