Stanislaw Muchy, 39, would then apparently climb out at night after staff
had clocked off and burgle the premises, reports Metro.
He made his getaway by sealing both himself and his loot into another box
addressed to his Warsaw home, say police.
His scheme came to an end after he fell out with an accomplice, whose job
was to deliver him to courier firms, who contacted police.
After being tipped off, police said: "We arranged a special delivery of our