The wife and I have been prepping for many years. After about three years of prepping we decided that we should have some sort of code to let the other know that something was not right. Our Trigger word is super easy and only we would readily recognize it. Most of us have 3 names first, middle, and last. I use my middle name and she uses her first name. If I were to call her by her Middle name or she was to call me by my First name we would immediately know that something was not right. Since all three names are correct, nobody else should find that odd. Since she never calls me Page and I never call her Frances, that would be like a rocket going off if we hear that. The bad guy could be standing right in the room with us and never know that we had alerted the other of the danger. Even if we are on the Phone or our Ham Radio, we could use the trigger word without raising attention.