Permission, notice, or just settle.

You were hit. The other driver carried the minimum. Their insurance company has offered its limits and sent a release. Your own policy has underinsured motorist coverage. Right there, before you sign, is a fork in the road, and most people drive through it without seeing it.

Underinsured motorist coverage, UIM, is the part of your own auto policy that pays what the at-fault driver's insurance cannot. Texas measures it simply: your UIM limit, minus what you recovered from the other driver's carrier, up to the damages you can prove. If your injuries are worth more than the other driver's limits, UIM is where the rest of the money lives. It is also where your own insurance company becomes the other side.

The clause you have never read

The standard Texas auto policy says, in one form or another, that UIM coverage does not apply if you settle with the person who hurt you without your insurer's written consent. That is the consent-to-settle clause. It exists for one reason. When your carrier pays you UIM benefits, it steps into your shoes and can go after the driver who caused the wreck. If you sign a release, the driver is off the hook, and so is the carrier's claim against him. The clause protects that right of recovery, what the courts call subrogation.

So the question at the fork is not whether you should take the other driver's limits. Usually you should, when that is all there is. The question is how you take them.

What Texas says when you just settle

The Texas Supreme Court answered this in Hernandez v. Gulf Group Lloyds. A family settled with the at-fault driver for his policy limits without telling their own carrier, then claimed UIM benefits because their damages were far larger. The carrier pointed to the clause and refused. The court held that a settlement-without-consent exclusion lets an insurer escape liability only when the insurer is actually prejudiced by the settlement. The driver had nothing beyond his limits, so the carrier lost nothing it could ever have collected, so the exclusion did not apply.

That is the good news, and it is real. It is also narrower than it sounds. The burden shifts to an argument about prejudice, about what the carrier could or could not have recovered from a driver you already released. On a driver with no assets, that argument is short. On a driver with a business, a second policy, or an employer behind him, it is not. Road three is a bet that the carrier cannot show prejudice. Roads one and two do not require the bet.

The other half: your UIM claim is a second case

People assume that once the other driver's carrier pays its limits, their own company simply pays the rest. It does not work that way. In Brainard v. Trinity Universal, the Texas Supreme Court held that a UIM insurer is under no contractual duty to pay benefits until the insured obtains a judgment establishing the liability and underinsured status of the other motorist. Benefits are conditioned on your legal entitlement to damages from the driver, so the carrier is allowed to wait until fault and damages are actually decided.

In plain terms, the UIM claim is a lawsuit against your own insurance company in which you prove the other driver was at fault and prove what your injuries are worth. The settlement with the liability carrier is step one. It is not the finish line, and it should never be signed as if it were.

The move

Before any release is signed, read your own policy for the consent-to-settle language. Then take road one or road two, in writing, and keep every letter. The difference between a UIM case that pays and one that turns into a coverage fight is often a single piece of paper sent before the release, not after.