Very simple questions, but when transferring Citi TYP to Turkish (trying to book 15,000 Hawaii flights and at the beginning of this crazy convoluted process), do you put the letters TK or just the 9 numbers after it. Don't want to do anything to mess the transfer up. Also, does anyone know if there are any restrictions when transferring or booking with Turkish on United (for instance, Korean wouldn't let me book more than 5 people including myself on Delta, and they all had to be family members and verified beforehand with birth certificates) regarding family members. Thanks!