Infinitely Renewing Coin

This gold coin is the work of either trickery or laziness. When an individual accepts the coin as payment, but is unaware of it's powers, the coin is magically returned to the previous owner's pouch or pocket after eight hours, either by means of teleportation or by being replaced by a mundane coin that is created or transported in as a replacement from somewhere besides the renewing coin's owner's stash.

Using this gold coin, an adventurer may pay for many things, but never run out of gold. It is a mischievous task.