Originally Posted by
SEAskyrider
From my experience you should not provide your FF# on the website but simply call up the rental company after your rental with your FF# and reservation confirmation # to avoid the fee. They then send the necessary request to the airline who will add the miles to your account. I have never been levied a fee with Alamo or National, haven't tried Avis (yet).
Thats a lot of work to save $3.00 - what is your time worth?