When a person dies, whether its someone we know or don't know, we tend to say ''rest in peace'' or ''RIP''. Does it have any effect on the person's soul? Or is it just a formality? Even at that I would prefer it coming from people who knows the deceased very well and not just from a bunch of strangers, at least you will know how sincere they are with the word.

So do you mean it when you say ''rest in peace'' or its just something that has to be said.

Ceasar1: Return If Possible Or Rest In Peace.

"Return If Possible'' ? ? ? To the likes of people who committed genocides and mass murder?

Its mere formality. Just like when you say "good morning" when you could care less how the person's entire lifetime turns out

myads890: Its mere formality. Just like when you say "good morning" when you could care less how the person's entire lifetime turns out

So saying it is as better as not saying it at all !