When the at-fault driver is not responding to their insurance company, your claim is not dead, but waiting is the worst thing you can do. Start building your case independently, use your own coverage to get bills paid now, and escalate through a demand letter, a state complaint, and if necessary a lawsuit. Every week you spend hoping the other driver will finally call their adjuster is a week closer to your filing deadline and a week further from the fresh evidence that wins claims.
Why the Silence Does Not Automatically Kill Your Claim
Every auto liability policy contains a cooperation clause that requires the insured to help with the investigation, forward legal papers, and authorize records. When a driver ignores those obligations, the insurer is stuck: it owes a duty to investigate your claim, but it is missing the one person who can give a firsthand account.
In most states, the insurer cannot simply deny your claim the moment their policyholder goes silent. The majority rule requires the insurer to show it was actually harmed, or “prejudiced,” by the non-cooperation before refusing to pay. That is a high bar. The insurer typically has to prove the silence cost it something real, like the ability to mount a defense, not just that the process was inconvenient.
What often happens in practice is that the insurer sends a reservation of rights letter to its own policyholder. That letter says the insurer will keep handling the claim while preserving the right to deny coverage later if the non-cooperation turns out to be genuinely harmful. For you, the injured party, a reservation of rights letter means the claim is still open, but the insurer is hedging. Treat it as a signal to press harder on the documentation side.
Gather Your Evidence Now
When the other driver will not participate, your evidence has to carry the case. The stronger your file, the harder it is for the adjuster to stall or lowball you.
- Police report. Request a copy from the responding agency. The report itself is generally not admissible at trial, but the officer’s observations, scene diagram, and any citations issued carry real weight in negotiations.
- Photos and video. Vehicle damage, road conditions, traffic signals, skid marks, and your injuries. Dashcam footage is treated by adjusters much like photographs and can be decisive when the other driver disputes what happened.
- Medical records and bills. Every record from emergency treatment, follow-up visits, imaging, prescriptions, and therapy. Track out-of-pocket costs like transportation to appointments.
- Witness information. Names and contact details for anyone who saw the crash. Their accounts matter more than usual when the at-fault driver provides none.
- Lost income documentation. A letter from your employer confirming your pay rate and the days you missed.
An adjuster evaluating a claim without their own driver’s statement will lean on whatever objective evidence exists. A thick file gives them enough to work with. A thin file gives them an easy excuse to delay.
Use Your Own Coverage While You Wait
Sitting on your hands until the other insurer decides to engage is usually the wrong strategy. Coverage on your own policy can get bills paid now while you pursue the at-fault driver’s insurer separately.
Collision Coverage
If you carry collision, it pays to repair your vehicle regardless of fault. You pay your deductible upfront, and your insurer then pursues the at-fault driver’s insurer to recover what it paid, including your deductible. This is often the fastest route to getting your car back on the road when the other side is stalling.
MedPay and PIP
Medical payments coverage (MedPay) pays accident-related medical expenses for you and your passengers regardless of fault, typically for emergency room visits, imaging, hospital stays, and aftercare. Personal injury protection (PIP), required in no-fault states, goes further and may also cover lost wages, rehabilitation, and essential household services you cannot perform while recovering.1Progressive. Personal Injury Protection vs Health Insurance Neither requires the other driver to cooperate. You file with your own insurer.
Uninsured and Underinsured Motorist Coverage
If the at-fault driver’s insurer ultimately denies the claim because of the driver’s refusal to cooperate, that driver may effectively become an uninsured motorist from your perspective. Your own uninsured motorist (UM) coverage can then step in to cover your injuries and, depending on the state, your vehicle damage. Underinsured motorist (UIM) coverage works similarly when the at-fault policy’s limits are not enough.2Progressive. What Is Uninsured Motorist Coverage If you are not sure whether your policy includes these, call your agent and ask.
Using your own coverage does not mean absorbing the loss yourself. Your insurer advances the money and then pursues the at-fault party’s insurer for reimbursement, including your deductible.3State Farm. Subrogation and Deductible Recovery for Auto Claims
Deadlines the Insurer Has to Meet
The other side does not get unlimited time to sit on your claim. The National Association of Insurance Commissioners publishes a model act that most states have adopted in some form, and it sets specific deadlines.
- 15 days to acknowledge. After receiving notice of a claim, the insurer must acknowledge receipt within 15 calendar days or make payment within that period, and must respond to reasonable follow-up communications within 15 days.4NAIC. Unfair Property/Casualty Claims Settlement Practices Act – Model Law 902
- 21 days to accept or deny. After receiving your documentation and proof of loss, the insurer has 21 days to tell you whether the claim is accepted or denied, and a denial must reference the specific policy provision relied on.4NAIC. Unfair Property/Casualty Claims Settlement Practices Act – Model Law 902
- 45-day updates. If the insurer needs more time, it must notify you within 21 days explaining why, and then send written updates every 45 days until a decision is reached.4NAIC. Unfair Property/Casualty Claims Settlement Practices Act – Model Law 902
- 30 days to pay. Once liability is affirmed and the amount is set, payment must be issued within 30 days.4NAIC. Unfair Property/Casualty Claims Settlement Practices Act – Model Law 902
Your state may have adopted slightly different numbers. But if the at-fault driver’s insurer is blowing past these windows without explanation, that is potentially a regulatory violation and gives you leverage for the next steps.
Send a Formal Demand Letter
A demand letter is your written notice to the at-fault driver’s insurer laying out what happened, why their policyholder is liable, what your damages are, and what you expect to be paid. It forces the insurer to open a file, assign a value, and respond on the record.
An effective letter includes a clear description of the accident, a summary of your injuries and treatment, an itemized list of your economic losses (medical bills, lost wages, repair costs), and a total figure. Attach the supporting documents. Set a deadline for response, commonly 30 days. If the insurer ignores it, you have a paper trail showing you tried to resolve the claim reasonably before escalating, and that trail matters if you file a complaint or a lawsuit.
File a Complaint With Your State Insurance Department
Every state has an insurance department that regulates how insurers handle claims. If the at-fault driver’s insurer is ignoring you, missing deadlines, or refusing to investigate, a formal complaint puts a regulator on the file.
Visit the NAIC’s consumer page to find your state’s department, then submit a complaint form with your policy information, a description of the problem, and copies of your correspondence.5NAIC. How to File a Complaint and Research Complaints Against Insurance Carriers Include a log of phone calls and emails with dates, names, and what was said. Regulators can investigate, contact the insurer on your behalf, mediate, and impose penalties for violations. A complaint does not guarantee payment, but adjusters tend to respond faster once a regulatory file is open.
Sue the Driver and Pursue a Default
When the informal channels fail, a lawsuit may be the next step. You typically file against the at-fault driver, not the insurer directly. Once you file, the driver must be formally served with the complaint.
If the driver still refuses to participate after being served, you can ask the court to enter a default. Under the federal rules, when a party fails to plead or otherwise defend, the clerk enters a default and the court can then issue a default judgment in your favor.6Office of the Law Revision Counsel. Federal Rules of Civil Procedure Rule 55 – Default; Default Judgment State courts follow similar procedures, and the court may hold a hearing to set the damages amount before entering the final judgment.
A default judgment is real leverage. Once you have a judgment, the driver’s insurer often has a contractual obligation to pay it; the driver’s non-cooperation does not erase the policy. If the insurer still refuses, the judgment becomes a personal debt the driver owes you, enforceable through wage garnishment or property liens. Most insurers would rather settle than let a default judgment stand, because the judgment amount can exceed what a negotiated settlement would have cost them.
Watch the Statute of Limitations
Every state sets a deadline for filing a personal injury lawsuit, and missing it forfeits your right to sue at all. Most states give you two years from the date of the accident, roughly a dozen allow three, a few are as short as one, and a few go as long as six. The clock usually starts on the date of the crash.
Some states apply a discovery rule that starts the clock when you knew or reasonably should have known about the injury, which can help when injuries were not immediately apparent. Extensions may also apply if the injured person is a minor or legally incapacitated.
The statute of limitations does not pause just because the other side is dragging its feet. If your deadline is approaching and the claim is not resolved, file suit to preserve your rights. You can always settle later.
Bad Faith and When to Bring in a Lawyer
Insurance companies owe a duty of good faith and fair dealing when handling claims. If the at-fault driver’s insurer crosses from slow to unreasonable, refusing to investigate, ignoring communications, or denying a valid claim without justification, that conduct may amount to bad faith.
Bad faith is a separate legal claim from your underlying injury case. If you can prove it, potential remedies go beyond the original claim amount and, depending on the jurisdiction, may include the full value of the denied claim plus interest, compensation for economic losses caused by the delay, emotional distress damages, attorney’s fees, and in extreme cases punitive damages. Punitive damages typically require clear and convincing evidence that the insurer’s conduct was intentional or showed conscious disregard for your rights. Not every delay or lowball offer qualifies. The conduct has to be genuinely unreasonable, not just frustrating.
Many straightforward claims can be handled on your own. When the at-fault driver drops out of the process, the complexity climbs quickly. Talk to a personal injury attorney if the insurer has denied the claim or stopped communicating, if your injuries involve ongoing treatment or serious lost income, if the statute of limitations is close, or if you are considering a bad faith claim. Most work on contingency, meaning they take a percentage of what you recover rather than charging upfront, so the incentives line up with getting you paid.