If you are missing the other driver’s address or other details after a car accident, do not fill gaps with guesses just to complete an insurance form. Record the facts you have, identify what is unknown, and ask your insurer how to lodge or supplement your particular claim. Whether missing information affects a benefit is a separate question from whether a claim can be submitted.
This is general information for Australian readers, not personal financial advice. Your policy, Product Disclosure Statement (PDS), exclusions and insurer’s assessment determine cover and claim requirements. An incomplete record does not establish eligibility or guarantee payment.
Separate missing information from an invented answer
In its motor pre-claim guidance, AAMI lists details about the event and damage, plus the name, address and registration of anyone else involved, as useful information. It also says customers can lodge without having everything ready and add details later. That is AAMI’s stated workflow, not a guarantee that every insurer’s form or every policy allows the same process.
Use three clear categories in your notes: directly observed facts, information someone supplied, and information still unknown. For example, a registration visible in your photograph is different from a number recalled uncertainly after the event. Do not turn an uncertain recollection into a confirmed identification.
Prepare a short missing-details note
Create one dated note for the insurer rather than scattering different explanations across several messages. Include the incident date, approximate time, location, your vehicle and the details you actually recorded. Explain exactly which field is missing and what you have already done to obtain it safely.
- List available names and contact details, identifying who supplied them.
- Preserve original photographs, messages and any written exchange.
- Describe vehicle details you observed without inventing ownership or insurance information.
- Mark uncertain time estimates and recollections as estimates.
- List the questions you need the insurer to answer before proceeding.
For example: ‘I recorded the other vehicle’s registration in the attached photograph. I have the driver’s first name and phone number from our message exchange, but no address. Please confirm how to record that missing field and how I should provide any later information.’ This is a hypothetical record format, not a statement that those details will satisfy your policy.
Ask about the correct channel and policy consequences
If the form will not continue without an answer you cannot verify, stop rather than entering a dummy address. Contact the insurer through its official published channel. Explain the field, your product and what evidence is available. Ask whether staff can assist with lodgement, accept the information another way, or tell you how to save the current work.
AAMI’s claims overview identifies eligible comprehensive motor products for its online service and separately identifies products for which that service is unavailable. A digital-channel limitation is not itself a refusal of insurance cover. Conversely, being able to use the online service does not establish that a claim is covered.
Ask separately whether the missing detail matters to an excess concession, recovery process or another policy benefit. Do not assume a registration number alone meets every requirement. If another driver has not contacted their insurer, see the separate checks for uninsured-driver benefits; lack of contact does not itself prove that someone is uninsured.
Add later information to the existing claim
Once a claim has actually been lodged, keep its reference and use the insurer’s specified update process. State what is new, its source and whether it replaces an earlier entry. Ask for confirmation that the relevant claim record has been updated; a message delivery receipt is not proof that the information has been processed.
If you are unsure whether the original form was submitted, reconcile that first. AAMI’s pre-claim guidance allows a customer to stop before submitting, so starting an online process is not the same as lodging a claim. Avoid creating a second claim merely because you cannot find the first reference.
Quick questions before you finish
- Have I kept unknown details explicitly unknown?
- Does the insurer have my actual claim, or only an enquiry or draft?
- What evidence remains outstanding, and how should I send it?
- Has new information been recorded against the correct reference?
- Which coverage or payment decisions remain unresolved?
Prioritise safety throughout. AAMI directs customers to call 000 if anyone is injured or there are dangers at the scene. Do not confront someone or delay urgent help to complete an insurance record.



