Why is my key not listed in the order history for QuickTime Pro?

Why is my key not listed in the order history for QuickTime Pro?

You would have to ask Apple to get a "real" answer. This is a peer-to-peer user foum and anything we say would be pure speculation.

from recent information posted by users;

Apple do not list any purchases after 18 months old in your online account.

if your looking for a QT Pro registration key code, you must refer to the purchase receipt email Apple sent you. If you have lost or deleted that, your only option is to purchase it again.