Well, I have been sending oversized letter, but was told that they shouldn't even offer that to the US. - I had a parcel go missing and was wondering if there was any way that I could get CP to refund, but there is no tracking info...
When you send Light Packet do they have tracking info? - I have only ever seen them put a little customs sticker on the odd one too, not every one.
I just dont' want to have any issues when it crosses.