Journey to the Savage Planet

It's best to do this and all the other death related trophies at the start of the game when you're easier to kill. The easiest way to get this trophy, is to attack a Pufferbird in the same cave you used for the Cannibals trophy, then let it kill you. After respawning inside the Javelin (which will pop Aaaaaaand we're back), head back outside then follow the Mission Marker (indicated by a Purple Parcel on your HUD) and locate both your corpse and loot box. Here's what your loot box looks like:


Your corpse and loot box should be within a few feet of each other but sometimes you will have to return to the site of your death, to find your corpse. Scanning your corpse will pop It's Me. But Not Me. But Still Me. and collecting your loot box will pop Return To Sender.

Note: Due to either a bug or a weird gameplay design choice (I'm not sure which it is) you can drop a loot box without actually killing yourself, by collecting some resources then quitting the game and reloading your save. For some reason, this action counts as a death and will generate a loot box at the spot where you quit the game so return there and collect it.