How much stuff has been stolen by Royal Mail employees this Christmas?
This was bound to happen when the royal mail decided to start emplying more agency staff to do its work. No offence to the majority of agency workers but when some people know they’re only going to be at a company for a short period of time the temptation for them to take what they can is too much. It sounds like you have a particulary bad case of this theft going on so make sure you complain strongly to the royal mail, maybe at least, someone may have a word with the sorters and mailman who deal with your address and they may leave you alone. I would say considering the amount of mail delivered the majority of mail workers are honest but a minority can do a lot of damage.