Save $10 on a $10 or greater purchase at JCP.com

For a single purchase of $10 or more at JCP.com (JC Penney), you can save $10 by using your MasterCard for the purchase.

I haven't tried it myself, but received a mailer today.  The purchase must be made between December 7, 2009 and December 24, 2009.  The Coupon Code to use at checkout is TRIM10.