An insurer’s letter assigning you 51 percent of the fault deserves a careful response, but it is not a court judgment. The percentage is the insurer’s position on the available evidence. You can ask what conduct and records support it, identify mistakes, and have the claim evaluated before accepting a settlement or release.
The consequences can be substantial under Louisiana’s current comparative-fault rule. That makes it especially important to distinguish a supported assessment from an unexplained number, and a dispute about who caused the collision from a dispute about the injuries it caused.
First confirm which law applies
Act 15 of 2025 changed Civil Code article 2323 effective January 1, 2026. Under the amended rule, an injured person’s negligence of 51 percent or more generally bars recovery; below that threshold, damages are reduced proportionately. Article 2323 also retains a separate rule for injury involving an intentional tortfeasor.
The change does not apply to every claim being negotiated in 2026. Louisiana’s Civil Code article 6 generally makes substantive changes prospective. For an ordinary collision, the accident date matters; a pre-2026 crash needs the earlier-law analysis even if a demand or lawsuit comes later. Confirm the applicable law before evaluating a threat of no recovery.
Ask for the reason behind the percentage
“You were mostly at fault” leaves important questions unanswered. Was the insurer relying on a lane change, following distance, speed, a signal, distraction, or a statement attributed to you? Which evidence supports the allegation? Does the assessment address the other driver’s conduct as well?
Keep the written explanation and the materials you receive. If the assessment changes, retain each version. A revised percentage may reflect new evidence, a corrected error, or a different interpretation; the change alone does not establish improper conduct.
A useful response takes the disputed point one at a time. If the insurer says you entered a lane when another vehicle was already alongside you, identify what the video, damage locations, witnesses, and timing actually show. Do not answer an uncertain speed estimate with a different unsupported estimate.
Some allegations may be supported. Counsel needs the unfavorable facts too. Concealing a message or insisting that every witness is wrong makes an accurate assessment harder. The question is what share of responsibility the evidence supports, not whether a fault allegation feels unfair.
Match the evidence to the disputed driving decision
Consider a hypothetical merging collision. A video may show when the lane change began, but its angle may not establish exact speed. Damage photographs may help locate the contact without revealing every movement before impact. Witnesses may have seen different portions of the event. Compare those limits before treating one item as decisive.
NHTSA’s event-data-recorder overview describes technical information that some devices record around a crash, including vehicle dynamics, driver inputs, and restraint information. Available fields vary. A qualified examination should identify the vehicle, recorded event, data limitations, and relationship to the collision; an EDR is not a video of everything that happened.
Keep original photographs, recordings, messages, and witness contact information. Identify vehicles that may soon be repaired or salvaged. Do not enter traffic, trespass, or dismantle equipment to obtain proof. In a commercial-truck case, the preservation-letter discussion explains how to identify records and custodians before relevant evidence disappears.
If the disagreement concerns an early statement, obtain the actual recording or written account through the appropriate process. Explain a genuine error promptly and accurately rather than trying to erase the earlier statement. Our article on communicating with an insurer addresses the difference between personal knowledge, estimates, and guesses.
Keep injury disputes separate from crash fault
A treatment gap, an earlier medical condition, and uncertainty about who changed lanes raise different issues. An insurer may contest whether the crash caused a condition or whether particular treatment was necessary. Those disputes do not automatically establish that the patient negligently caused 51 percent of the collision or injury.
Ask which issue the insurer is raising. If it disputes causation, the response may require a medical history and professional opinion. If it alleges negligent driving, the relevant evidence may concern speed, visibility, signals, or vehicle positions. A medical bill cannot settle the lane-position question, and a lane diagram cannot diagnose an injury.
Describe symptoms, earlier problems, treatment decisions, and limitations accurately. If care was delayed, explain what actually happened without inventing a medical justification. The minimal-damage article discusses how to evaluate vehicle and medical evidence without treating either as an automatic answer.
Understand what an offer assumes
Ask whether a settlement offer reflects disputed total damages, a fault reduction, a coverage limit, or several of those factors. A single dollar amount may hide materially different assumptions.
For example, suppose proven damages are $100,000 and the applicable rule assigns the injured person 20 percent negligence. The proportional reduction leaves $80,000 before other legal and collection issues. At 51 percent, the general amended negligence rule bars recovery. These are arithmetic illustrations, not estimates of a particular claim’s value.
A percentage attributed to an unidentified driver does not automatically become your fault. Article 2323 requires consideration of all contributing persons, including nonparties, but each person’s responsibility must be assessed. The presence of an additional potentially responsible person can also raise collection questions distinct from your own percentage.
Review the assessment before signing a release
Our Baton Rouge car accident practice can compare the insurer’s explanation with the available record and identify what further investigation would be useful. Bring the denial or offer, claim correspondence, accident date, and any recordings or photographs you have. A disagreement about fault does not itself establish that litigation will improve the result.
Keep deadline review separate from negotiations. Article 3493.1 provides the two-year period for covered delictual claims under the law effective July 1, 2024; older events and special claims require their own analysis. Claims involving federal employees may require administrative presentment before suit. Do not assume that an open claim file or an ongoing argument over percentages preserves the right to sue.
Sources checked: September 29, 2026. Last reviewed: September 28, 2026.