Call PADI (800.SAY.PADI) and explain what the instructor is trying to do. It would help to have another party (another student perhaps?) back up your claim. Then it won't be a your-word-against-his deal.
Be sure to have as much information as possible. Full name and PADI number if you can.
Why? The OP did not say an instructor was trying to do this, merely asking if it was an option.