The short answer
A reservation of rights letter means your insurer will defend the lawsuit for now but may refuse to pay later, for the reasons listed in the letter. It is not a denial, and it is not a promise of coverage. In Illinois, it can also give you rights, including in some cases the right to choose your own lawyer at the insurer’s expense.
Why it matters
Illinois penalizes insurers that refuse to defend and turn out to be wrong: they can lose their coverage defenses entirely. So an insurer with doubts usually defends while “reserving its rights.” Many of these letters are precautions. The letter tells you where the insurer sees a problem, not how the coverage question will end.
Where it fits in your case
Usually soon after you send the lawsuit to your insurer, before or around the time a defense lawyer is assigned.
What to expect
Specific grounds. A proper letter identifies the policy language and the facts the insurer is relying on. If it only quotes the policy or reserves “all rights” without explanation, ask in writing what the actual grounds are.
Choosing your own lawyer. Sometimes the insurer’s interests and yours pull in different directions. If a lawsuit says your employee hurt someone on purpose or, alternatively, by accident, and your policy covers only accidents, a lawyer the insurer picks would be defending a case the insurer partly hopes to lose. When a real conflict like that exists, Illinois law lets you choose your own lawyer, and the insurer pays reasonable fees. Not every letter creates this right.
Repaying defense costs. An Illinois insurer generally cannot make you pay back defense costs unless the policy itself says so. The letter alone cannot add that obligation.
Settlement. The insurer may still be involved in settlement decisions, so keep coverage concerns in writing as the case develops.
What to do now
Keep meeting every court deadline. They do not pause for the coverage dispute.
Read each reserved ground against the lawsuit’s allegations. A ground that depends on facts the lawsuit will decide is where a conflict usually sits.
Respond in writing to anything that seems wrong or unclear.
Raise a possible conflict early, before the defense is well under way.
What we need from you
The letter, the complete policy with every endorsement and the declarations page, the lawsuit, and any correspondence with the insurer or your broker.
Common misconceptions
“They’re defending, so we’re covered.” Coverage is still in question.
“We have to use the lawyer they chose.” Not if there is a real conflict.
“The defense lawyer can advise us on coverage.” Usually not. That lawyer is paid by the insurer you may be disputing with.