While at Disney, we lost a magic band. To be more specific, a magic band on the Magic Keeper lanyard clip, on a Thor lanyard. After tearing apart the room, thinking about where it was last at, we gave up and went to the front desk of our resort.
There we were given a new magic band, it was activated, the old one deactivated, and the slip of paper that you see above with a URL to file a claim.
On our way back to the park that day, I filled out the claim multiple times, since you need to fill it out once for each location. When we got back to Magic Kingdom, I asked the Security Guard checking our bags where something, if it were lost, might go. He pointed me me to the right direction, and we stopped by the Guest Services at Magic Kingdom after stopping by the last place our oldest had had his backpack open, a pressed penny machine at the gift shop just past security. The girl seemed to remember something being found, so we headed to Guest Services. There we were describing out lost Magic Keeper, and miraculously, it had been turned in, but also to her, the CM helping us, who had remembered the tiny little Thor hammer hanging from it.
While our stressful few hours had a happy ending, I learned a few things that might make it easier for you to find your lost item.
1. File the report ASAP, but don't wait for Disney to contact you. Keep checking with them.
2. Lost items don't instantly get transported to the central lost and found area for all of Disney. They stay, until the end of the day at the location they were lost. This really improves your chances of getting your item back if you can remember where you lost it.
3. The better you can describe something, the easier it will be for them to find your item. Lost items are kept in Ziploc's, and there could be hundreds piled together in a box or on a shelf, so saying, the blue magic band on a lanyard, is going to make the search longer, and quite possibly unsuccessful, as opposed to saying the blue magic band, on a Mickey head magic keeper, on a Thor lanyard that looks like this, (showing picture)
Disney has a pretty good return rate I was told, and while I hope you never lost anything, if you do, it will probably work out very quickly you get your item back, especially if you follow the above advice.