Log into your American Airline (AA) account through the American Airline website (See Resources) using your AAdvantage number and password.
Scroll down to where it says "Purchase Miles" in your AAdvantage Account tab.
Click on the "ShareAAmiles" tab. Enter your name, AAdvantage number, AA account password and an email address for confirmation purposes.
Enter the recipient's first and last name, AAdvantage number and the number of points you would like to transfer to your friend of family member's account. There will be a fee of $50 per 5,000 points transferred and a $30 processing fee.
Complete the payment process with a valid credit card and check your email for confirmation regarding a successful transfer of your AA points to someone else.