Letterbox burglary is when a burglar uses a letterbox on a front door to either break into a property or steal the keys inside (this could be to steal the car parked outside the property or to access the house). Generally, the burglar will either use their hand to push through the letterbox and reach up to unlock the door from inside the house, or they may use a fishing rod gadget with a hook on the end to ‘fish’ for keys left near the door.