I don't buy Old Navy jeans (they just don't fit me right), but I got an email for a "mystery" discount. When you put it in the code it tells you if you received 10, 20, or 50% off your order. If anyone was planning on ordering/shopping, you can PM me your email and I'll forward it to you. I don't know if it's a one-shot thing or if you can use it multiple times, though.