I know this has probably been asked but I couldn't find it by searching so will ask again. I promised a kid that works for us that if he did a good job this summer we would bring him with us on our trip in Oct. Well he's done a great job & it's time to start planning the trip, problem is this; he's 17 won't be 18 untill Oct.5th, 4 days after we plan on arriving. His parents are divorced with his mom & dad sharing custody. Do I need a letter from both parents or just one, does it need to be notorized & will a bith cert. & drivers licence be ok for his I D to get into & out of Mex.?