I think the only way is to dupe the tickets. You can do this by saving your game save on your USB, then go into the game and send your ticket. Finally, quit the game and reload your save data from your USB.
A word of advice, try it with some paints first until you know you are doing it right. 👍
EDIT : Just read the OP and finally understand what you are saying.
Just go to community, click on the user you want to trade with, click on gifts and there should be a folder called tickets. As long as you haven't opened them.
