I just purchased a king size Sealy Conform mattress and tried to register it online. It asked for the serial number which is located on the top left of the mattress. After the mattress was delivered I placed the mattress protector, the sheets, the down comforter and the bedspread on it. Now I am supposed to find the serial number which is under the bedding? Why can't the number be attached to any material left by the deliverer? I am 76 years old and putting the bed together is a chore. Now I have to strip it to find the serial no. Not smart on Sealy's part. Very disappointed!