There is a House Delivery mission checkpoint in each of the three cities. House delivery missions can be attempted only by civilians (regardless of their wanted level). In order to complete the mission you will have to deliver one of the many delivery items, some of which being illegal, to a randomly selected house throughout San Andreas.
You have 12 game hours to complete a house delivery, and you receive an extra bonus based on time and distance when you complete a delivery. Any vehicle can be used to complete a house delivery.
Press the Sub-Mission Key or type /mission during a house delivery mission to get information on the current delivery location.
Type /cancel at any time during a house delivery to cancel the current mission.