The samething happened to my family in December 2005. We were on our way to the Airport, when my Dad realized he forgot his ticket. I had mine & luckily I knew both the numbers were the same, expect for the last digit. Also to add to what Windy City Heather said, I don't think your previous vacation had to have been in the last 6 months. Cast Members have been able to see on their computers every vacation that my family & I had when staying at a WDW Resort, going back to May of 1998. I think once you check in & all your info is put into the computer, all your previous WDW Resort Hotel stays come up. Even if it's stays at other WDW Resorts. I know this because Cast Members have sometimes told us you have had a lot of stays here. The samething is also true when making reservations with CRO. Sometimes they say you have had this many stays at the Contemporary & this many at the Wilderness Lodge. (Those the only 2 Resorts my family & I have stayed at, which is why I used them as examples.) So I hope that this information helps & that WDW can replace your tickets.