When a vehicle is checked out, the Car Hire
Office must obtain authorisation for the full estimated amount of the charge.
The estimated charge must be determined by multiplying the applicable rental
rate by the hire period.
The authorisation approval code will be valid for the life of the rental
agreement provided the authorisation amount is within 15% of the final
submitted transaction amount.
When the vehicle is returned, if the final charge is greater than the estimated
charge plus 15%, then the Merchant shall obtain authorisation for any
additional amount of the charge which is greater than the estimated charge.
If such authorisation is not requested or is requested and declined and the
Cardmember fails to pay the charge for any reason, then American Express has
the right to chargeback.
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