This is why I always wait until I see an Avis person physically scan the vehicle. In the past i would also wait for the printed final receipt but now they all prefer to email it. So far the email has been fine and I can usually pull up the receipt in the app. But based on this post I think I will continue requesting the paper copy.

The lesson here is never leave the car until you see someone close it out. The consequences if it is not done right will cost you more in terms of time and money than waiting.