I accidentaly bought a seaworld child's 2 day e-ticket. At the gate can i upgrade it to an adult?
Answer :
If you purchased the ticket from Sea Worlds web site, then you will need  the original order confirmation, and you will have to take it to the  guest services window, pay the difference in the child's and adults  ticket price, and then you will be able to get in. If you were not the  one who placed the original order, if you lost your confirmation, or if  you purchased the ticket from some other web site other than the Sea  World web site than you will not be able to upgrade the ticket. They do  this to prevent people who buy tickets on E-bay and Craigslist from  upgrading them.
Answer :
If you purchased the ticket through a discount site you may not be able  to upgrade, but if the ticket was purchased through the official  Seaworld ticket sales venue you should be able to speak to Guest  Relations at the park and they will likely be able to assist you with  upgrading to an adult ticket provided you pay the price difference and  can provide a receipt showing the original purchase price.
Answer :
Why don't you call Seaworld and ask?  I would imagine they could answer  the question much quicker and more accurately than anyone on this site.
Yuuuup, you need your name, signiture and finger  print to get it :)
As they have machines where you put your card, pass, or ticket in (or  scan it) and then it says "Hello, _____" n the screen then you must put  your index finder on the scanner. And if this dosent work then you'll  need to have ID with your signiture on, as you'll need to sign the pass  when you get it :)
Hope i helped :D