Law News · June 15, 2026 · 2 min read
What Happens If I Sign a Release and Later Discover My Injury Is More Serious?
By Jack Hirsch — Personal Injury Attorney · Certified Specialist, Injury & Wrongful Death · State Bar of Arizona, admitted 1988
Legally reviewed by Chelsie Talcott, JD Published Jun 15, 2026 Last updated Jun 15, 2026 Editorial policy Disclaimer
Short answer.
Signing a release after an accident typically means you agree not to pursue further claims in exchange for a settlement. However, if you later discover that your injuries are more severe than initially believed, Arizona law provides avenues to challenge that release.
Signing a release after an accident typically means you agree not to pursue further claims in exchange for a settlement. However, if you later discover that your injuries are more severe than initially believed, Arizona law provides avenues to challenge that release.
Arizona Law and Your Rights
Under Arizona law, a release can be set aside if it was signed under a mutual mistake regarding unknown injuries. This means that if both parties were unaware of the full extent of the injuries at the time of signing, the release may not be binding. The Arizona Supreme Court has recognized that such mutual mistakes can invalidate a release, allowing the injured party to seek further compensation.
Recent Case in Phoenix
In the case of Dansby v. Buck, the plaintiff, Ruth Dansby, was involved in a car accident and believed her injuries were minor. She signed a release with the defendant’s insurer, settling the claim. Later, it was discovered that her injuries were more severe than initially thought. The Arizona Supreme Court ruled that the release was induced by mutual mistake and should be set aside, allowing Dansby to pursue her claim for damages. This case underscores the importance of fully understanding the extent of your injuries before signing any release.
Statute of Limitations
It’s crucial to be aware of the statute of limitations for personal injury claims in Arizona. Generally, you have two years from the date of the injury to file a lawsuit. However, if you discover the severity of your injury after signing a release, the timeline may be affected. Consulting with an experienced attorney can help you understand how these time limits apply to your specific situation.
What To Do Next
If you’ve signed a release and later discover more serious injuries, it’s essential to act promptly. Contacting a knowledgeable attorney can help you assess whether the release can be challenged and what steps to take next. At Hirsch Talcott, our team, including attorney Jack Hirsch, a Certified Specialist in Personal Injury and Wrongful Death, and attorney Chelsie Talcott, a former Maricopa County Deputy Public Defender, has extensive experience in handling such cases. We operate on a contingency fee basis, meaning you pay no fees unless we win your case.
For more information on our services, visit our personal injury attorneys page. To learn more about attorney Chelsie Talcott, click here. For details on our fee structure, visit our fee structure page.
At Hirsch Talcott, we are committed to helping injured Arizonans navigate the complexities of personal injury law. If you believe your signed release was based on a mutual mistake regarding the extent of your injuries, contact us at 602-903-6000 for a free consultation.
Where to get help
If this situation applies to you, Hirsch Talcott offers a free consultation — speak with a Phoenix wrongful death lawyer to understand your options.
Keep reading — related topics
- What Are the Steps to File a Personal Injury Claim Against Arizona State or a City?
- Can I File a Personal Injury Claim If I Was Doored by a Car While Riding My Bike?
- How Is a Traumatic Brain Injury Valued in a Personal Injury Settlement?
- What Are the Signs of a Traumatic Brain Injury After a Car Accident?
- Can Children Sue for the Wrongful Death of a Parent?
- How Long Do I Have to File a Wrongful Death Claim in Arizona?
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