Help Leaving behind letters

[Nortu]

I'm unsure if there is even a reason to leave behind a few small letters to people. Since my method will likely wound up with those collecting bodies or the police. Does anyone know if your messages will actually be delivered after your death? Because if I were to leave anything behind I would seal them and write who they are meant to go to. But I don't want anyone else to see them unless they choose to themselves.
Its been nagging me since I don't know if the collectors would have rules to not do anything about the would be evidence.
So if anyone has any experience about it reaching the right people afterwards I'd gladly hear.
If it's too unstable I'll probably schedule sending them on the day it happens so they actually arrive with certainty

 

[Charlie-Bravo]

Probably depends on the police department. Like if they are overworked, etc. You can leave the letter with your other stuff(birth certificate or bank depots), that your family or friends will needs after your death.