What a nice gift, but too bad you ordered it a little bit too soon, right? It's a fruit tree, and as such desperately needs sunlight. Mine is in full blazing sun all day in Florida. Fruit trees need sun!! Can you maybe park it at someone else's place until the surprise day? That would be the best thing to do as long as they will (or you can) water it. A potted tree needs to be watered every day. Put a reminder in your phone. Morning is best, and a good soaking so that the water runs out the bottom of the pot is needed in the height of summer.
There's no need to worry about re-potting if you are giving it away in 9 days, unless you want to spend money on a pretty pot. Will the person be planting it outdoors in the ground? If so, it would be a waste to re-pot now. If they plan to keep it on a patio or deck in a large container, I'd advise you to let them choose the new container. Then re-pot the little tree.
Btw, for future questions we really need to know your approximate location. If you'd please complete your personal profile (the little person icon in the blue side bar to the left) with your city/state/country then that info will come up in every post. See mine in the upper right corner?
