Dear Severus Snape,
It has come to my attention that your son has lost three teeth this summer and I have yet to see a single one. I am greatly upset that I have been unable to get my hands on them for my collection. Therefore, it is with great sincerity that I must ask you to do the following: STOP STEALING YOUR SON'S MOLARS FROM UNDER HIS PILLOW AND USING THEM IN POTIONS! I cannot compensate him fairly when you steal his teeth. Please take this into consideration the next time you decide to brew.
Sincerely,
The Tooth Fairy