In the Uk we dont have a customs form, its a sticker that goes on the front of the parcel/box, and the person at the PO checks the signature,value, contents etc are all filled in
problem is there isnt a customs number on it to trace the item either .
So your seller says he has had a few parcels go missing? hmmm there have been some cases in the UK recently where things had gone missing and it turned out that a couple of posties had kept lots of mail and parcels ... they were found out though (and the mail was not opened) so hopefully whatever they didnt deliver will get delivered soon. I dont know if your seller was affected by this type of thing, or if perhaps the parcel just got held up at customs, or maybe its still at the PO.. its possible that the PO will take things more seriously if a number of this persons parcels havent been delivered lately. I hope that its just Royal mail being slow rather than postie troubles or a seller going dodgy though. We'll just have to see what he replies with after he has been to the PO .