How about coupons? They usually expire after a year, or six months. Not in California? Hm.. Road trip!! /s
Checks usually go stale after a time period, even government ones at 6 months. I got a refund from a well-known coin hobbyist magazine once, whose checks had no expiration date. I thought that was pretty cool.
Nope Coupons are not covered. The idea that you or someone gave a company money and received an in-kind card/slip or whatever for the cash. Your "whatever" in your hand is the same as cash to that company.
A coupon is not that type of instrument.