Can I use the credit I received for referring a friend when I book on the website? Avail Team December 05, 2019 07:00 Updated Follow Not yet, but we’re working on it! To use your credit, you will need to make a reservation using the Avail Car Sharing app. Related articles Are there any restrictions on my trip? When do I pay for my trip? How does Avail determine which car I drive? Can I smoke in the car? Comments 0 comments Please sign in to leave a comment.