I underpaid a $3 postage fee by 12 cents. What will happen to my package?
I forgot that a stamp is now worth 47 cents instead of 49 cents, so I underpaid in postage. Will the USPS a) return it to me for the remaining 12 cents, b) send it with postage due from the recipient, c) just send it & ignore my goof, or d) make it disappear in a warehouse in Atlanta?