Silverbeard wrote on Nov 15^th, 2012 at 2:30pm:

You need to register it with 'another company' as you bought the product from them.

Good thinking Silverbeard! ;D

@alexplgr - Register with another company, and then you'll probably get a "confirmation" email from Captain Sim.
Once you get that confirmation email, you will be able to Check-in to Your Profile.

It probably works the same way as it does when you buy a download version from one of the partner/affiliate online stores. ;)