What to do when you are in a rental car accident
At the scene of the accident
If you or someone involved is injured call 911 immediately. The most important thing is that everyone is safe. If anyone may need medical attention make sure they get it right away, no matter whose fault you think the accident was. Cars can be replaced; people cannot.
Request a police accident report. If no one is injured, but damage is done, call the police. You will need to have an accident report to show your insurance company, even if it is a hit-and-run while your car was parked.
Take notes and pictures. No matter how the accident happened, take notes on what occurred and pictures of any and all damage. Exchange insurance information with any parties involved. Gather witnesses if necessary, and keep this information on hand to relay to the rental agency and your insurance company.