Allows you to drop IOUs for items to say "hey, here's a paper reminding you that I'll pay you back!"
First, take some rad items from your pal.
Then press Ctrl + I while holding an item (stack) to generate an IOU (stack). It will get tossed in front of you, just like you dropped it. Your pal can pick it up!
Once you return or repay the items, your pal can delete the IOU(s) by right clicking the IOU with the owed items in their inventory (holding the returned item(s) in your cursor and right clicking the IOU(s) like a bundle)
You can make a strict IOU (NBT must exactly match) by instead pressing Ctrl + Shift + I
