The information to collect after a car accident falls into a few clear buckets: the other driver’s identity and insurance, the vehicles involved, the scene itself, any witnesses, photographs of everything, and the police report number. Gather it all before you leave, because details fade within hours and the other driver may be hard to reach within days.
Driver and Insurance Information
Once everyone is safe, exchange information with every other driver involved. Write down each driver’s full name, home address, phone number, and email. Ask to see the physical driver’s license and note the license number and issuing state. People sometimes transpose digits or recite an old address from memory, so viewing the card matters.
Do the same with the insurance card instead of relying on what someone tells you. Record the company name, the policy number, and the policyholder’s name if it differs from the driver. If the driver does not own the vehicle, get the owner’s name and contact information too. The policy follows the vehicle, so the owner’s coverage is what responds to a property damage claim even when someone else was driving.
Vehicle Details
For every vehicle involved, note the make, model, year, and color. Record each license plate number and its state of issuance. Also locate the Vehicle Identification Number, a unique 17-character code federal regulations require on every passenger vehicle.1NHTSA. Final Rule Vehicle Identification Number Requirements On most cars you can read the VIN through the windshield on the driver’s side of the dashboard without opening the door. The VIN lets your insurer pull the vehicle’s exact specifications and removes ambiguity about what was damaged.
Make written notes about damage to anything else at the scene: guardrails, fences, signs, mailboxes, landscaping. Be specific. “Guardrail bent approximately two feet inward over a six-foot section” is more useful weeks later than “guardrail damaged.”
Extra Information for Commercial Trucks and Buses
Collisions involving commercial vehicles need a few additional items. Federal law requires interstate commercial vehicles to display the carrier’s legal or trade name and a USDOT number on both sides of the vehicle in letters readable from 50 feet.2FMCSA. Marking of CMVs and Intermodal Equipment 390.21T Write down the USDOT number, the company name on the truck, and any MC or MX number. Those numbers let your attorney or insurer look up the carrier’s safety record, insurance, and corporate details through the FMCSA’s online database.
If the driver hands you a business card or mentions a dispatcher’s name, keep that too. Commercial claims often involve the trucking company and its insurer rather than the individual driver.
Scene Context
Document the precise location using street names, cross streets, or highway mile markers. A nearby business or landmark gives a second reference point if the intersection is ambiguous.
Record the date, exact time, and the direction each vehicle was traveling just before impact. Direction of travel establishes who had the right of way at intersections, merges, and lane changes. Capture the conditions in the same breath: weather, road surface, and lighting. “Raining, road wet, dusk, streetlights not yet on” paints a picture a bare police report often leaves out.
Note the status of any traffic signal, whether a stop sign was present, and anything unusual: construction zones, potholes, obscured sight lines. These situational details often decide who bears fault.
Police Report Number and Officer Details
If police respond, get the investigating officer’s name, badge number, and the report number. The report number is your key to obtaining the official crash report later. In most jurisdictions it becomes available within a week or two from the responding agency or the state’s department of motor vehicles for a small fee.
Pay attention to what the officer does at the scene. If they issue a citation, note the violation. If they create a diagram or take measurements, that will appear in the report. Officers sometimes decline to respond to minor collisions; if that happens, ask the dispatcher whether you can file a report at the station or online. An official record you initiated is still stronger than none.
Witnesses
Bystanders who saw what happened can break a deadlock when the other driver’s version contradicts yours. Approach anyone who stopped and ask for their name and phone number. People are often willing to help but rarely stick around, so prioritize speed over formality. A name and cell number in your phone’s notes app is enough.
If a witness mentions something specific, write it down immediately: “Saw the other car run the red light” or “Heard tires screech before looking up.” Paraphrased observations captured within minutes carry more weight than a recollection gathered weeks later by an adjuster.
Photos and Video
Your phone camera is the single most valuable tool at the scene. Shoot deliberately:
- Wide shots from all four corners showing the final resting positions of every vehicle relative to the road, lanes, and traffic signals.
- Close-ups of every dent, scrape, and broken part on all vehicles, from multiple angles.
- A clear photo of each license plate.
- Road evidence: skid marks, debris fields, fluid spills, gouge marks on the pavement.
- Traffic controls and road features: signs, signals, lane markings, speed limit postings, obstructed sight lines.
- Visible injuries: cuts, bruises, swelling, bloodstained clothing.
Take more photos than you think you need. Storage is free, and a missing angle can cost you thousands in a disputed claim.
Dash Cam and Nearby Surveillance
If you have a dash cam, do not overwrite the footage. Remove the SD card or mark the file so it stays preserved. If the other driver has one, ask whether they will share a copy.
Look around for surveillance cameras at nearby gas stations, banks, and businesses. Many face the road, and footage of the moment of impact is the strongest possible evidence of fault. Most commercial surveillance overwrites automatically within 24 to 72 hours, so if you spot a camera, visit or call the business as soon as possible and ask them to save the footage. If they refuse, an attorney can send a preservation letter that creates a legal obligation to keep it.
Your Own Written Account
Before you leave the scene, or shortly after, open your phone’s notes app and write a plain narrative of what happened. Include what you were doing in the seconds before impact, what you saw the other vehicle do, and what happened immediately after. Note anything the other driver said, especially any acknowledgment of fault or mention of being distracted: “He said he was looking at his GPS” or “She told the officer she didn’t see the stop sign.”
Also note whether the other driver appeared to be using a phone, seemed drowsy, or showed any signs of impairment. These observations are easy to forget within days and can significantly influence a liability determination. Specific, time-stamped, and honest beats eloquent every time.
Medical Records After You Leave
Many injuries from car accidents, particularly whiplash, concussions, and soft tissue damage, do not produce symptoms for 24 to 72 hours. Get evaluated by a medical professional as soon as possible, even if your symptoms seem minor. That first medical record creates a documented link between the crash and your injuries. Keep organized copies of everything that follows: emergency room reports, diagnostic imaging, specialist referrals, prescriptions, and physical therapy notes. Every gap in your treatment timeline is a gap the opposing insurer will use to argue your injuries are unrelated or less severe than you claim.
What Not to Say
Collect information generously. Volunteer opinions sparingly. Saying “I’m sorry, that was my fault” gives the other driver’s insurer a statement they will use to reduce or deny your claim. Fault is determined by evidence, not by who felt guilty in the moment.
Stick to factual exchanges: names, insurance details, and a basic description of what happened for the police report. If the other driver’s insurance company contacts you later and asks for a recorded statement, you are not obligated to provide one. Politely decline and speak with an attorney first.
Reporting the Accident
Most auto policies require you to report an accident within a few days. Failing to notify your insurer promptly can give them grounds to delay or deny coverage, even if the accident was entirely the other driver’s fault. You do not need every detail finalized before you call. Provide the basics: date, location, the other driver’s information, and the police report number if one was assigned.
Most states also require you to report the accident to law enforcement or the state DMV when the collision involves injuries or property damage above a dollar threshold. Thresholds vary, but many fall in the range of $1,000 to $2,500 in damage. Leaving the scene of even a minor property-damage accident without exchanging information or reporting it can result in fines, license points, or a misdemeanor charge depending on the jurisdiction. If anyone is injured, call 911; failing to stop and render aid is a serious criminal offense in every state.