https://www.avis.com/en/legal-documents/rental-terms
2.3 Rate Eligibility Requirements. If at the time of booking, the rate in the Agreement is a conditional rate (such as a special rate, promotional rate, or corporate rate) or benefit discount code, and at the time of booking or at any time during your rental, you fail to meet the conditions of the rate, we will charge you the applicable default higher rate for similar rentals. An unauthorized use of a conditional rate or benefit discount code will be viewed as an unlawful use and theft of services for which Avis can pursue legal remedies, including but not limited to reasonable attorneys’ fees and costs, and for which Avis can void any associated discounts or rental benefits.