Post office helps with second hand transactions

If you go to the post office and pay an additional 1,000 won and request a photo service, the post office will send the photo [a photo taken by a post office employee before packaging] to the recipient.

However, for this to work as a safe transaction, the deposit must be made after delivery, not after deposit.

Simply using the post office photo service after making a prepayment only allows you to first notice fraudulent transactions without goods, so it cannot prevent professional fraud groups.