Originally Posted by
uoficowboy
Similarly, the father of a friend of mine is a lifetime platinum, as well as currently an executive platinum on AA. His son, my friend, has the same name. He regularly uses his dad's FF number to get upgrades, access to the lounge, etc. Been doing it for years.
I do not know what they do about birthdates.
While the frequent flyer's birthdate is in the computer profile, it is not an item that is verified or checked when redeeming miles or obtaining perks (like entering lounge). When earning miles, all that is needed is the flyer's name and his/her FF number. So, if you know someone who has the same name, you can definitely combine earnings and share perks. Its also something for the miles-fanatic to consider when naming his/her offsprings! :-)