Tracking history will then prove that the parcel has been delivered back to the sender (with the GPS co-ordinates)!
Hope this helps!
Yes, true (you mean scan the 1D barcodes, though). It's just some of those examples in the photos would have only had a 2D barcode, that has been obliterated, and no 1D barcode to use instead.
The red stickers that say dear customer etc should only be used if correct postal address has been put on said letter or parcel. just to remind the sender that their item has been delayed due to wrong postcode being used. the other red sticker is usually used for dead mail.
FYI. This is what the pink labels look like, to be used on international RTS items. Ask your manager to order some for from delivery office.