1. Most airletters with a pre-paid indicia have been sold at a small premium over the then-current aerogramme postal rate.

2. New USPS Certified Mail Postal Rate Summary: • Certified Mail with Electronic Delivery Confirmation will cost $4.91 (Electronic Delivery Confirmation Report Example) A USPS Special Service that provides the sender with a mailing receipt or proof of mailing and an electronic verification the article was delivered or that a delivery