Awaiting user response

Then you write a support ticket after 7 days and tell support that the winner didn't tick the box.

DO NOT write a support ticket yet if you are talking about Tiny and Big: Grandpa's Leftovers.
Winner has 7 days to mark as received, after that you can write a support ticket or add winner/comment/email politely reminding them to mark as received.

Thanks, so long as it doesn't have a negative impact on my ability to create giveaways I'm not sure I care enough to make a ticket about it after 7 days but I appreciate the responses :)

People should really learn to READ the FAQ.