You don't have to prove fault on the day of the crash, but what you notice then can matter later. Lanes, signals, where the cars stopped and what was said all feed into the insurer's view. For people in Diamond Bay, we explain how fault is weighed in a NSW claim and help you decide whether the question needs a lawyer. Often it doesn't. When it does, we'll connect you with one.
Eastern Suburbs · Car accident lawyer help
Diamond Bay car accident lawyer: when fault is argued
Most injured people can claim whoever caused the crash. Fault decides what happens after that.
Postcode: 2030

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Local context for a fault question in Diamond Bay
Old South Head Road and Syd Einfeld Drive have busy intersections and short merges. If the other driver's insurer says you contributed, your own notes from the day and any witness details become important evidence. If you were taken to St Vincent's Hospital, the ambulance and emergency records often note the type of impact, such as being hit from behind or side-on. That early description can support your version of how the crash happened. With bus stops on Old South Head Road nearby, buses and other commercial vehicles are a regular part of local traffic. Many carry cameras, so if one was involved in your crash, ask early whether the footage was kept.
- Region
- Eastern Suburbs
- Postcode
- 2030
- Main roads
- Old South Head Road · Diamond Bay Road
- Nearest public hospital
- St Vincent's Hospital
- Getting around
- bus stops on Old South Head Road
What to note near Diamond Bay that bears on fault
The insurer that decides fault will not have been there. It relies on what people recorded at the time. So record what you can: the time, the weather, the road surface, the lane markings and the direction each vehicle was travelling. If a witness stopped, ask whether they'll give their name. A note written that evening is worth more than a memory months later.
- The lane each vehicle was in, and any lane change
- Where each car came to rest, photographed before moving if safe
- Names and phone numbers of anyone who saw it
- Exactly what the other driver said, written down that day
Read next:What to do after a car accident in NSW
If the insurer says you contributed
Insurers look at more than who hit whom. They may ask whether you wore a seatbelt, how fast you were going and whether you were distracted. The finding is usually a percentage. A small one trims damages and later weekly payments. One greater than 61% has a much bigger effect, because it rules out damages altogether.
Check the percentage
If the insurer puts your share of fault above 61%, damages are off the table and benefits are generally limited to 52 weeks. Most insurer decisions can be internally reviewed, generally within 28 days of receiving the decision.
Read next:Can I claim if I was partly at fault?
Where fault leaves your claim: four common positions
People often assume that being at fault means getting nothing. That isn't how the NSW scheme generally works. The four situations below show what usually changes as your share of the blame goes up.
Situation 1
You were not at fault
Your claim goes to the CTP insurer of the vehicle that caused the crash. You can receive statutory benefits, and if your injury is more than a threshold injury, a common law damages claim may also be open to you.
Situation 2
You were partly at fault
If you contributed to the crash or your injuries, for example by not wearing a seatbelt, the insurer may argue contributory negligence. Weekly payments after 52 weeks may be reduced, and any damages can be reduced by your share.
Situation 3
You were wholly or mostly at fault
For accidents from 1 April 2023, a driver found wholly or mostly at fault generally still receives statutory benefits for the first 52 weeks, but cannot claim damages. A child aged 16 or under at the time is still covered for the treatment and care they need, however long that is.
Situation 4
No one was clearly at fault
Some crashes happen without any driver being at fault, for example after a sudden medical episode or an unforeseeable mechanical failure. NSW has 'blameless accident' rules that may let an injured person claim in some of these cases. They are technical, so get advice.
General information, not legal advice. Fault and contributory negligence are decided on the evidence. Time limits apply.

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Tell us what happened and what the insurer has said about fault. We'll point you to the right help, whether that's a lawyer, a doctor or neither.

Passengers and fault
Passengers usually have the simplest fault position of anyone in a crash. You weren't in control, so the question is only which driver caused it, and that decides which insurer deals with you. Where both drivers share the blame, you may still be blameless yourself. That matters later, because damages depend partly on your own share of fault.
Many passengers hesitate to claim because the driver was someone close to them. It helps to know the claim is made against the CTP insurer, which exists for exactly this situation. The driver may be asked for their account, and any fault finding affects their own claim, not your right to make yours. Talk it through if you're worried about how it will land.
Read next:Passenger injury claims
Chain crashes and split blame
Chain collisions are where fault gets complicated. The driver who started it may carry most of the blame, but a driver behind who was following too closely can share it. Each vehicle has its own Green Slip insurer. Your task is to record every vehicle involved and the order of the impacts; the insurers' task is to sort out which of them responds.
Passengers and drivers caught in the middle of a chain crash often feel stuck between insurers. Your claim generally shouldn't stall while the insurers sort out their shares. Keep a note of every call, who you spoke to and what they said. If no insurer will take responsibility, that is a good moment to ask for advice.
Read next:Multi-vehicle accidents
Dashcam, witnesses and the police record
An independent witness, someone with no link to either driver, can carry real weight. Get their name and phone number at the scene if you can. If you can't, the police record may have their details. Photos of the final positions of the vehicles also matter, since damage patterns often show the angle and order of impact.
The police event number links your claim to the official record of the crash. The insurer can use it to check who was involved and what was reported. It's worth getting even if the crash seemed minor and police didn't attend, because a record made close to the time is harder to dispute than one pieced together later.
- Dashcam footage, saved as the original file
- Photos of both vehicles' damage and final positions
- Your own written account from the first days
- Any messages the other driver sent after the crash
Save footage early
Shops, buses and homes with cameras often keep footage only briefly. Ask in writing as soon as you can, giving the date, time and exact spot.
Why fault matters more for a lump sum than for benefits
Fault works more like a dial than a switch. A small share reduces some later entitlements. A share above 61% limits benefits to the first 52 weeks and rules out damages. No share at all keeps every option open. Knowing where the evidence puts you on that dial helps you decide whether a lawyer's view is worth having before the insurer settles its position.
Rules change
The fault rules and benefit limits described here apply to accidents from 1 April 2023. Earlier accidents can have different limits, so check the rules for your accident date.
Read next:At fault vs not at fault
When fault is disputed
A fault finding isn't final just because the insurer has made it. Most insurer decisions can go to internal review, generally within 28 days of receiving the decision, and then to the Personal Injury Commission. Before you accept a finding that you were mostly at fault, have someone look at whether the evidence supports it, because so much turns on that line.
Read next:At-fault self-check
Do you need a lawyer for a fault question?
A lawyer isn't a box to tick after every crash. When fault is clear and accepted, many people run their own claim. When it's argued, split or pinned on you, advice is often worth having.
Often worth talking to a lawyer
- The insurer puts your share of fault above 61%
- A seatbelt or speed argument is being used to cut your claim
- The other driver changed their story after the crash
- The other driver's insurer says you caused the crash
You may not need one
- Your question is about treatment, not about who caused the crash
- You mainly need a doctor to record your injuries
- The other driver admitted fault and the insurer accepted it
Before any fault argument, get the right care. We can connect you with doctors and allied health experienced with CTP claims, who can treat you and complete a clear Certificate of Fitness whatever happens with fault.
Not quite your situation?
- If you're not yet sure whether this is an injury claim, a damage claim or something else, the car accident claim page helps you tell them apart. Car accident claim in Diamond Bay
- If you've already decided to engage a solicitor and want to know how the file runs stage by stage, see the car accident solicitor page. Car accident solicitor in Diamond Bay
- If you weren't in a car at all but on a motorbike, a bicycle or on foot, the motor vehicle accident page covers your situation. Motor vehicle accident lawyer in Diamond Bay
Frequently asked questions
If your claim is against that vehicle's CTP insurer, you'll deal with them to run it, so a call is normal. Stick to facts, don't guess about speeds or injuries you're unsure of, and keep a note of the call. If you're asked for a detailed recorded statement about how the crash happened, you can ask for time to get advice first, especially if they're questioning who caused it.
'Mostly at fault' means your contributory negligence is found to be greater than 61%. If you were wholly or mostly at fault, weekly payments and treatment and care are generally limited to the first 52 weeks, and you can't claim common law damages. For accidents from 1 April 2023, most people in that position still receive those first 52 weeks of statutory benefits. Because so much turns on the line, a finding close to it is worth having reviewed.
Not by itself. An apology can be mentioned, but insurers decide fault on the evidence as a whole: police records, damage patterns, photos, footage and witnesses. People apologise for many reasons, and drivers sometimes change their account later. Write down exactly what was said and when, then collect the harder evidence. If fault is disputed, those records will count for more than the apology.
The insurer decides on the evidence, not on which account sounds more confident. It will look at the police record, the damage to each vehicle, where the cars stopped, any footage and any independent witnesses. While that happens, most people can still receive statutory benefits. If the insurer accepts the other driver's version and you think the evidence points the other way, the decision can generally be reviewed. That is a good time to get advice.
Generally, yes. You claim against the CTP insurer of the vehicle at fault, which here is the Green Slip insurer of your friend's car. The claim is against the insurer, not against your friend personally. Passengers are rarely found at fault, though contributory negligence can still be raised in limited cases, for example if you knew the driver had been drinking. Your friend may be asked for their account, which is normal.
Not automatically, although it can help. A traffic fine or a criminal charge is a separate process from your claim, and the insurer generally looks at all the evidence rather than relying on it alone. A conviction can be strong support for your account. A charge that is dropped, or no charge at all, doesn't mean the other driver wasn't at fault. Keep a copy of any police paperwork you receive.
Car accident lawyer: suburbs near Diamond Bay
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CTP Lawyer is not a law firm. This page is general information, not legal advice; the independent lawyer you speak with can advise on your own situation.