Sign into the Zipcar mobile app and visit your account page. From there, select Driving Credit to view your current balance. To redeem a promo code and add more credit, select the + icon in the top right of the screen. Enter your coupon code, click redeem, and your earned driving credit will be added to your account.
Visit https://members.zipcar.com/gift/redeem to redeem your promo code or gift card. You’ll be asked to sign in with your Zipcar credentials. Once signed in, enter your promo code or gift card in the gift code section, and click redeem.
To view your newly added driving credit, visit the Billing page of your account. On the right-hand corner of your screen you will see your credits, where your earned driving credit will be displayed.
A list of rules and regulations regarding gift cards can be found here.