What Would You Do?

Used snail mail to make a payment to the Idaho Tax Commission about 10 days ago. Over the weekend, I received the original envelop and payment inside a U.S. Postal Service envelope. Seems the payment got caught in a post office machine and mangled. Strangely, it seems to have been dropped in water, too, since the ink on the check was mostly washed off. I give the USPS props for getting the payment back to me in time to send in another payment before the deadline. However, I have a question for you …

Question: Should I ask the post office for the stamp back? I don’t need the money, of course. But it would be nice to make a point, for those times in the past, when the post office returned a payment or letter for lack of a penny or 2 worth of postage. What would you do?