IMHO I'm not sure I want to pay the taxes for extra staffing and equipment to set up a last-century-technology snail mail notification system. Half of them will bounce back as undeliverable and then do you chase those down or pay someone to shred them? Or the new resident opens it up and just found out that the prior resident has a carry permit? No thanks.
In the day and age that everyone is carrying a supercomputer on their hip, I just tell google calendar to create a reminder a few years in the future. If you really worry whether the Chinese find our about it, you can always call it something obscure.