You can get a completed form Report of Lost or Stolen Motor Vehicle Items MV-78B from a police agency and send form MV-78B with form IRP-6.
Where could I surrender my items? I have another plate I'd like to surrender.
You should sent it to International Registration BureauPO Box 2850 ESPAlbany  NY 12220 - 0850s
That's really far from where I live, I can't afford going there. I want to send them by mail, can you give me some information about that?