Invitation

An invatation is a unique piece of stationary that cannot be bought by Tom Nook or any one else. It only appears in Animal Crossing: City Folk. It is used to gain acess to Crazy Redd's store, located in the city. It can be obtained from a villager, another player, a character at the city, or from Crazy Redd himself, via mail. Once you recieve the invatation, you can go to Crazy Redd's store. However, you'll have to pay for a membership which costs 3,000 bells. After you buy a membership, Crazy Redd may offer you an invatation that can be sent to any one in town. If that person recieves the invatation, and visits Crazy Redd, the player who sent the invatation will reciev 1,000 bells from Crazy Redd the next time the player visits the store.

Trivia
Some villagers say that you should not show your invatation to Copper.