If your character is dead, you should move to leave the battlefield or (if you died inside of Veilguard) head towards the nearest border of the town. While you are doing this, cross your arms in front of your body to signify to other players that you are dead and your character is not actually present, and if anyone approaches you with their weapon drawn call out “Dead!” to verbally inform them that they are not allowed to strike you.

Note that there are no invisibility effects in this game, so death is the only thing capable of making you-the-player imperceptible to other characters in the game. Do not abuse this call or the arms-crossed signal to pretend to be dead/invisible when you are not. Do not go exploring while you are dead and on your way to Respawn. Go directly to where you can Respawn, and then you can resume playing as usual.