Our local Kohl's (Wooster) will no longer accept expired Kohl's cash, effective August 1. Be sure to use it by the exp. date. I don't know if this is across the board at Kohl's or just our area, so if you tend to use expired Kohl's cash, you might want to verify with your store.
This is a corporate decision so all stores should be effective. Use your Kohl's cash now.