The only places that can know of you,.... are suppliers that required a registration to unlock some previous software.
Many quite big names will sell you an upgrade whoever you are. One time it was only necessary to make some feeble show of having a license for a "lite version" of a rival product.
One thing to watch is the obvious one ---- will it install if it doesn't find the previous version on your hard disk?
Upgrades to many of the components of Microsoft office have been like that.
Another point is that you may have receive little more than the CD for your money, because it is assumed you already have what to them is the most expensive part - the Manuals.