New Zealand Post has been selling off people's lost and undeliverable items - and keeping the cash - for the past 12 years, the Herald on Sunday can reveal.
A mountain of parcels and letters which cannot be delivered are stored by NZ Post annually.
Items of value are held for three months before being sold off at national auction house Turners, the company has admitted.
In the past year, NZ Post has bagged just short of $44,000 from auctioning about 6000 items and selling some goods on Trade Me.
"Mail items get returned to us for many different reasons, including when someone has moved and there is no forwarding address, the address is incorrect or a PO Box is no longer in use," said NZ Post spokeswoman Jaimee Burke.