How to File a Claim With Someone Elses Car Insurance
You file directly with the other driver's insurer using their policy information and your documentation of what happened.
A Driver Backs Into Your Car in a Parking Lot
A woman was leaving a grocery store when another driver backed out of a spot without looking and hit the side of her car. The other driver admitted fault on the scene and they exchanged insurance information. She took photos of both cars, the damage and the parking lot layout before leaving, and wrote down the other driver's license plate and policy number.
That evening she called the other driver's insurance company and opened a claim. She gave them the date, location and a plain description of what happened, along with her photos and contact information. An adjuster called her within a few days, reviewed the damage estimate from a body shop, and the claim was approved without her having to involve her own insurer at all. The whole process took about two weeks from the first call to the repair being finished.
What If the Other Driver's Insurance Says It Wasn't Their Fault?
This happens more often than people expect, especially when there are no witnesses or the damage pattern is unclear. If the other insurer disputes fault, you have the right to push back with evidence like photos, a police report or witness statements, and you can ask them to explain their reasoning.
If you can't resolve it directly, you can file with your own insurer instead and let the two companies sort out fault between themselves, which is exactly what your coverage is for. You may also escalate a dispute to your state's insurance department if you believe the other insurer is acting in bad faith. Keep every document and note the name of everyone you talk to, since disputes are won or lost on the details you can prove.
Once you understand the claims process, compare quotes to be sure your own coverage can back you up if it's ever needed.
What You Need Before You Call
- Their policy information You need the other driver's insurance company name and policy number, not just their name and phone number. Get this at the scene if you can, or from the police report if one was filed.
- Your own documentation Photos of both vehicles, the location and any visible damage make your claim move faster and harder to dispute. Take them before anything is moved or cleaned up.
- A clear account of what happened Write down the sequence of events while it's fresh, including time, location and what each driver did. This becomes the basis for what you tell the adjuster.
- The claims department contact Call the other insurer's claims line directly rather than waiting for them to reach out. Most companies have this number on their card or website.
- Your own insurer as a backup If the other company is slow or disputes fault, you can still file through your own policy and let the insurers settle it between themselves. Check what coverage you have for this situation before you need it.
Why You're Allowed to File With Their Insurer at All
Car insurance liability coverage exists specifically to pay for damage the policyholder causes to someone else. When another driver is at fault, their liability coverage is meant to cover your losses, and you have a legal right to make that claim directly rather than going through your own company first. This is sometimes called a third party claim, and it's a normal, well established process that insurers handle every day.
The reason this works smoothly most of the time is that fault is usually clear and the facts aren't in dispute. The other driver ran a red light, rear ended you, or backed into your car, and there's little room for argument. In these cases, the other insurer has every incentive to settle quickly, because delaying doesn't change what they owe and may cost them more in administrative time or interest.
Where it gets more complicated is when fault is shared, disputed, or hard to prove. Some states follow rules that reduce or eliminate your ability to recover if you were partly at fault, and those rules vary significantly by state, so it's worth checking how your state handles shared fault before you rely entirely on someone else's insurer. Some states also require you to go through your own insurer first for certain types of claims regardless of fault, so check your state's rules and your own policy terms.
The other variable is whether the at fault driver actually has insurance or enough coverage to pay for your damage. If they don't, your own policy's uninsured or underinsured motorist coverage, if you have it, becomes the backup. This is why many people choose to carry that coverage even though it protects them from someone else's failure to insure properly.
You're not at the other insurer's mercy. You can document, escalate, or fall back on your own coverage.
