what happens if i put the wrong postage on an international letter
Postage Due. If you send a first-class letter or package without enough postage, the post office will try to deliver the mail with a Postage Due notice. If the recipient refuses to pay, it will come back to you with a notice of insufficient postage.he recipient will have to pay the additional postage before being able to receive the letter. If the person declines, then it becomes dead mail.. If it's a magazine or other printed matter without sufficient postage, the post office will dispose of it.