My SON donated his hair a couple of years ago. I sent a note with the hair explaining that his hair has never been cut and this was a first time ever haircut...I got a post card thanking my daughter...I sent them another note and said please send a proper thank-you card to my SON...NEVER RECEIVED ANYTHING. I feel that they take the hair and run..and they make a lot of money selling this hair... I think they are mostly a sham. I feel they should be scrutinized closely.