Boarding Pass Info

Two years ago('14) when I was on a 4 flight segment from Zihua to Fairbanks Alaska. I received the dreaded "selectee" designation on my boarding passes. It followed me thru two TSA checks after clearing customs in LA for the last segment in Anchorage, I decided just to remain in the secured area for my 4 hour layover. Later in talking to AK Air and TSA, I was told that Alaska Air in '14 used a system approved by the Mexican version of TSA that selected out approx. 10 % of a flight for more rigorous scrutiny and that designation would follow a passenger until the end of their itinerary. IT was Ak Air's way of complying and not inconveniencing 90% of its passengers. Not sure what they are doing in '16. The best advice is to look at your first boarding pass and if it says selectee or SSSS just take the first boarding pass and tell the boarding agent in Zihua that you will get the reminder of your boarding passes in the next country.