Just had 11 letters returned to me with a post office sticker asking for customs declaration to be completed .These envelopes contain a very flat 3d printed item weighing just 25 grams. So took them into the post office only to be told that as of the 1st of April you can no longer send anything other than paper using a standard envelope . The post cost rocketed to $29 per item which has pretty much stuffed my enterprise !
