You got lucky. We didn't get a sticker or an autograph card. My DD had her autograph book out after I'd read that Olaf signs autographs. The CM was kind of rude and said Olaf would not be signing anything that day. My DD was sad. I told her that Olaf didn't know how to spell. She's seen Frozen Ever After (dry banana hippy hat) so my explanation made sense to her. LOL. She would have been really happy with a card or even a sticker instead. I wish we had gotten something. The only other character we've met who doesn't sign at all is the Beast, but when we met Belle at Epcot, my DD asked Belle to sign for the Beast, and she did.

So as of now, Olaf is the only missing spot in her autograph collection.