Originally Posted by
jaciqltznok
you can purchase a "certificate of mailing" though and it counts like a receipt.
I was also told that the padded envelopes are no longer the Flat rate price, that they will go by weight now! Also if under 4 pounds First class is cheaper!
on usps.com website the padded flate rate envelopes are still a flat rate price. maybe they have not changed it to "by weight" yet. they give you a receipt when you mail an international package which is your receipt of mailing. the postal service cannot track an international package once it leaves U.S. soil so you cannot purchase tracking.
first class mail is only up to 13 ounces so i am not sure what kinda swap package would be under 13 ounces unless one sends a gift card instead of items.