Final answer:
After witnessing a car accident, it is essential to file a police report, notify your insurance company, and notify your rental car company, if applicable, to properly document the incident and begin the claims process.
Step-by-step explanation:
If you have witnessed a car accident, there are several critical steps you should take to ensure the situation is handled properly. First, it's important to file a police report to officially document the incident. The report can be valuable for insurance claims and legal proceedings. Secondly, immediately notify your insurance company of the accident, especially if you're involved, to initiate the claims process and receive guidance on next steps. If you are using a rental car during the time of the accident, you must also notify your rental car company; this is crucial as rental companies often have specific procedures and insurance requirements that must be followed. Lastly, filing a claim with the loss-prevention team might be necessary if the incident occurred on a property managed by a business or entity that has a process for handling such events.