Didn't Exchange Information After an Accident? What Still Counts, and What to Do Next

This article is for general information only and is not legal advice. It describes what the California Vehicle Code says and what a driver can still record afterward. Whether any duty applied, or was met, in a specific crash is a question for a licensed attorney in your state.

Most people do not drive away with nothing. They drive away with a partial: a plate they think they remember, a first name, a photo of a card that turns out to be expired, or a handshake and "let's not involve insurance." Then a day passes, a bumper cover comes off, or a neck starts to hurt, and the question becomes what that partial is worth. The short answer is more than it feels like, provided it gets written down now.

What the law actually asks you to exchange

California puts the list in one place. Under Vehicle Code section 16025, every driver involved in an accident must, unless incapable, exchange with the other drivers and property owners present all of the following:

• Name and current residence address.
• Driver license number.
• Vehicle registration or identification number.
• The registered owner's current residence address, if the owner is someone else.
• Evidence of financial responsibility, which for an insured driver means the insurer's name and the policy number.

Failing to exchange those items is an infraction, with a fine the statute caps at $250. The duty runs both ways and does not wait to be asked; the surest way to meet it, and to get all of it from the other driver, is to photograph the license and insurance card rather than to transcribe anything. Our car accident checklist covers the rest of the at-scene list.

Stopping is the duty with teeth; the card swap is the checklist

What happens if you do not exchange information depends on which duty is in question, and the Vehicle Code separates them. The serious one is the duty to stop and identify yourself. In a crash that damages only property, section 20002 requires the driver to stop immediately at the nearest place that does not block traffic, find the owner of the damaged property, and give name and address, showing license and registration on request. If the owner cannot be found, the driver must leave a written notice with that information and report the crash to the police without unnecessary delay. A violation is a misdemeanor, with up to six months in county jail and a fine of up to $1,000. Where someone is injured or killed, section 20001 adds the duty to stop and render aid, and the penalties rise sharply.

The lighter one is the section 16025 list above, an infraction if the items are not exchanged. Those are the two statutes; this article describes them and does not apply them to any particular crash. If both drivers stopped and spoke and the question is only which details went unrecorded, what is missing is the record, and the rest of this article is about rebuilding it. If the other driver left the scene, that is a different situation, covered in hit and run: what to do first.

"I only got their plate": what a plate, a time, and a place can do

A plate number is the one item the other driver cannot take back. With it, and with the time and location of the crash, two things become possible.

The first is identification. A plate number names a specific vehicle and, through the DMV's registration records, its registered owner. That identification exists whether or not the other driver cooperated, and it is the reason to write the plate down before anything else.

The second is the accident record itself. Reports filed with the DMV are confidential in general, but Vehicle Code section 16005 permits the DMV to disclose the names, addresses, vehicle registration numbers, date, time, and location, and insurer information from an accident report to the drivers involved, to any person injured, and to the owners of damaged vehicles or property. That is the path by which a driver who has a plate and a filed report can end up with the other party's details: through the accident record, with the DMV releasing it to a person who was involved.

Which leads to the report. If anyone was injured or any one person's property took more than $1,000 in damage, section 16000 requires a report to the DMV within 10 days, on the DMV's form, whether or not police attended. Not having the other driver's insurance details is a reason to file it with the fields you can complete, not a reason to skip it. The statute asks the reporting driver to name any person complaining of injury, with an address if available; "if available" is the statute's own allowance for exactly this situation.

Fake, expired, or missing insurance: what usually happens next

Sometimes the exchange happens and the card is no good. California requires every driver and owner to be able to establish financial responsibility at all times and to carry evidence of it in the vehicle under section 16020, and section 16028 requires that evidence to be shown on request at a crash scene to a peace officer or collision investigator. The requirement exists because the gap is real: the Insurance Research Council's 2023 study of 2022 data, as reported by the Insurance Information Institute, put the uninsured share of motorists at 14.0 percent nationally and 17.0 percent in California.

California auto policies also carry uninsured motorist coverage under Insurance Code section 11580.2, written for exactly this gap, with statutory minimum limits of $30,000 per person and $60,000 per accident for bodily injury. The statute sets its own conditions for the case where the other vehicle was never identified at all; a driver who has the other party's plate is usually not in that case, which is one more reason the plate is worth writing down.

For context, the state's minimum liability limits rose to 30/60/15, meaning $30,000 per person and $60,000 per accident for injury and $15,000 for property damage, on January 1, 2025, under Senate Bill 1107 of the 2021 to 2022 session; the DMV's insurance requirements page carries the current figures. None of this is a prediction about any claim. It is the set of rules that sit behind a card that turns out to be worth nothing, and the reason the record made at the scene, and within the hour afterward, carries the weight.

"I was shaken and got nothing": rebuilding the record from home

The version of this that people are most embarrassed about is also the most recoverable, if it is done within the hour rather than the week. Sit down and write, in this order:

1. The location. Drop a pin, or write the cross streets and the direction each car was traveling.
2. The time. Your phone's photo timestamps, a call log, or a text you sent will fix it.
3. The other car. Color, make, body type, any damage you saw, and every fragment of the plate you remember, in the order you remember it. Write the fragments down even if incomplete.
4. The other driver. A physical description and, as closely as you can, what they said, in their words.
5. Witnesses and cameras. Anyone who stopped, and any business, bus, or intersection camera facing the spot. Our guide to getting traffic camera footage covers how those requests work and how quickly footage is overwritten.
6. Your own car, now. Photograph the damage today, with the time and location on the files, before it is driven or washed.

Then file the reports that apply. Some police departments accept online or counter reports for non-injury crashes after the fact; check yours. What that looks like when no officer ever attended is in car accident with no police report. And the DMV report in section 16000, if the thresholds are met, is filed with what you have.

Two things do not come back, and they are worth naming so the rest can be kept in proportion. The plate you half remember will not sharpen with time, and the witness who drove off is gone. Everything else on the list above can be rebuilt from home. Our piece on how fast each type of evidence disappears ranks the rest.

What you have to give, and what you may be worried about giving

Some readers arrive here from the other side of the exchange: they were asked for information and are uneasy about handing it over. The section 16025 list includes a current residence address, and that is the statute; each driver owes the other the items on the list, and each is owed the same. This article does not offer a way around that, because there is not one to offer. What it does suggest is symmetry: photograph their documents as they photograph yours, so both records are complete and neither depends on anyone's handwriting.

Frequently asked questions