Disklavier

We bought a new DC1A in October from PianoPlus in CA.  After 9-10 
weeks of waiting, we finally had our piano tuned by a technician.  He 
mentioned that we should have some type of "warranty" paper or
package by Yamaha.  We never received anything from the dealer other 
than a receipt.  Should we expect some type of warranty package soon?

How does Yamaha track their customer information?

Thanks for your help.
-Jessica