Originally Posted by
fridgy
details on the ticket needs to be same as in passport. Therefore number 3 will be safest I think.. nobodys gonna know nor care what date was the children DOB anyway..
Does the child have his/her own FF account with UA (or a Star Alliance partner) with the FF number attached to the reservation? If so, I would guess that changing the birthdate could raise alarms in the computer system.
IIRC you can't make (some?) changes to secure flight once it's within 72 hours of scheduled departure.