Hi
4 years ago we gave my parents a Anniversary Gift of WDW.
When you make reservations you have them put on the reservations it's a GIFT* and who the reservation is for and they will bill you, and send all the information to the recipiant.
My parents had no problems in check in, since the reservations were under there name/address when they showed their Driver's License's.
Hope it helps...
I also had them list my telephone # as well as my parents
just in case there were any questions!
