Second hand used Interfaces and Licensing

Hi there,
I’m about to buy a second hand UR824 coming w/Cubase AI 6.
Apparently, the previous owner did never register the product (UR824 and Cubase AI).
I just want to be sure i’ll be able to use cubase and if the product will be upgraded to Cubase 12 Pro if i register the UR824 myself on steinberg website, how does it work ?
Thanx for your help !
Best regards,

Technically, they have to supply you with the activation code that came in the box when they bought it.

But you might be able to ask Steinberg Support for a license after you own the device.

Of course, you will not get a $600 Cubase Pro software title for free. Cubase AI license is an introductory feature-limited program. But the company is liberal in how they give the AI license out.