I am familiar with AP codes as we have used them several times over the past couple of years. However, I have been reading in the forums about specific codes that are mailed to people from Disney. I am not familiar with these codes. Is this something that Disney does for people who have visited in the past? Is it just for people from the U.S. (I'm from Canada)? I've also read about people calling to ask the CM to check their files to see if they have a code. Could someone please explain these codes to me? 

Hope this helps you a bit.