National has had this same promotion for the past few years. You will receive a free rental day for every two qualifying rentals that you do during the promotional period from August 20th to January 31st, 2013. You can redeem your free rental days starting September 10th and must redeem them by June 16th, 2013. You can register for this promotion here.
National will email you/send you a link to the page where you can find the redemption codes for the free rental days. You can combine to have up to 3 of these on the same reservation. The only requirement is to be a National Emerald Club member and to rent a midsize or larger vehicle in the 50 United States for two consecutive days or longer.
This is absolutely the best free rental credit promotion out there. You will earn your usual credits for free rentals in conjunction with this offer. The only drawback is that you can have maximum 3 free rental days in one reservation.
If my memory is right, these won’t allow one way rentals as the regular free rental days from national do.
Here are the terms and conditions of this offer:
One Free Rental Day will be awarded for every two qualifying rentals made after the date on which the member has registered and which occur between August 20, 2012, and January 31, 2013. Credit will not be given for rentals made prior to a member’s registration date. A qualifying rental is the paid rental, via the Emerald Club®, of a Midsize or larger vehicle at participating National Car Rental locations in the 50 United States, including the District of Columbia, for a period of two or more consecutive days during the promotion.
Earned Free Rental Day fulfillment will begin on September 10, 2012, (solely by email to the email address provided at the time of registration) and thereafter will occur within 1–2 weeks after the second qualifying rental. To redeem a Free Rental Day, visit emeraldclubpromos.com/12Free/2012 to view your free day certificates, click redeem and then rent a Compact through Fullsize car starting after September 10, 2012, and before June 16, 2013. To take advantage of this offer, make a reservation at least 24 hours in advance. No more than three Free Rental Days may be redeemed toward one rental of three or more days. Unfortunately, we cannot combine this offer with any other discount and cannot apply the offer to a previous or existing reservation. All standard rental qualifications apply. Be aware that taxes, surcharges, recovery and recoupment fees and other charges may apply, and that optional products and services (such as damage waiver and additional driver fees) are extra charges. Please check your auto insurance policy and/or credit card agreement for rental vehicle coverage. The availability of this offer is limited to participating U.S. locations and is subject to change without notice. Blackout dates may also apply. We cannot accept the coupon if it has been purchased, bartered or sold for cash.
Referrers of friends and colleagues through our email form and social media links will earn a maximum of ten Free Rental Days, regardless of how many friends and colleagues enroll. In order to receive credit, referred friends and colleagues must use the email address provided by the referring party at time of enrollment and conduct a rental by January 31, 2013.
To be eligible for the complimentary credit toward a Free Rental Day, you must electively opt in to receive emails from National. Offer expires January 31, 2013, and is valid for new opt–ins only.