Instead of putting it on a piece of paper, make it useful and print it on a orange bandanna so people will be more incline to keep it and can use it for other things like filtering, signaling,dust mask, etc.. you get the idea. On one side of the bandanna you can put your instructions with company logo and on the other side the words HELP! and the below symbol. I would also put some basic survival instructions on it as well.



Kinda of like the below but you have to make sure not to copyright it.