My name is a 3rd, and when "true ID" stuff came out, I did what I thought I needed to do and added it to my profiles. Adding "III" to my last name (as a suffix) screwed up so many things in so many random places. I think my favorite was I couldn't change any award tickets online with Delta because it would say my name didn't match my SkyMiles account (it did). I finally just took it off all my airline accounts and have never had any issues since.