How do I add my Plenti card number to my car reservation at Alamo in advance of my car rental?

You can book your Alamo rental car at Just make sure you add your 16 digit Plenti card number to the online reservation form when you book your car.

If you’re booking your car over the phone, just mention to the call center agent that you are a Plenti member and provide your Plenti card number.

Always make sure you have your Plenti card number available when you pick up your rental. You will need to provide your Plenti card number at the time of pick-up even if you provided it at the time of reservation.

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