Go to hp.com and click on the chat link then ask there.
A big clue is the lack of the usual serial number.
But why are you asking? Buying from some disreputable site or some back end of the truck?
I'm planing to buy HP Probook 420s (i3) notebook.
What are the thing should I need to consider when buying it?
(eg: How should I check that is the genuine HP notebook or not? Are there any utilities to check it?)