well, spooks does have a point. because according to ebay, this is what a like new item is
Like New: An item that looks as if it was just taken out of shrink wrap. No visible wear, and all facets of the item are flawless and intact
that would include that code, not telling you what to do, but theoretically, you could get shafted buy a buyer who expects that code and doesnt receive it. remember paypal sides with the buyer damn near 100% of the time