A reservation of rights letter can feel deceptively routine. The insurer agrees to defend, the claim keeps moving, and everyone assumes the coverage issues can be sorted out later. In practice, that “later” is often where expensive surprises show up.
A reservation of rights is not just a formality. It is the insurer’s notice that it may provide a defense while preserving arguments that some or all of the claim falls outside coverage. Courts and commentators routinely describe that position as a potential source of conflict, especially when facts developed in the liability case may also affect coverage. Cornell Law School’s Wex and the American Bar Association both explain that a reservation of rights can create conflict-of-interest issues, though not every reservation automatically does so.
If you want the foundation first, this overview of what a conditional defense and coverage position can really set in motion helps frame the bigger picture.
In this post, you’ll learn six common reservation of rights mistakes that can quietly increase coverage risk, why those mistakes matter, and where an attorney may help separate an ordinary defense arrangement from a more serious coverage problem.
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Coverage disputes often turn on timing, wording, and what happened in the underlying case record. A late response, a careless statement, or an unexamined conflict with appointed counsel can shape the insurer’s later position in ways that are harder to unwind once discovery closes or settlement opportunities pass.
That risk exists because reservation of rights disputes sit at the intersection of contract law, claims handling, defense strategy, privilege, and state-specific insurance rules. Some states impose timing or procedural requirements on insurers asserting coverage defenses. Florida, for example, has a statute addressing when a liability insurer may deny coverage based on a particular “coverage defense,” including written reservation-of-rights notice within 30 days after the insurer knew or should have known of the defense and additional follow-up steps within a defined period. Fla. Stat. § 627.426. California separately codifies when a conflict may require independent counsel, including situations where the outcome of a reserved issue can be controlled by insurer-retained defense counsel. Cal. Civ. Code § 2860.
In other words, reservation-of-rights disputes are rarely just about whether a letter was sent. They are often about what rights were preserved, what conflicts were created, what information was shared, and what strategic choices were made before anyone realized the coverage fight had already started.
One of the biggest mistakes is assuming a reservation of rights letter is only administrative. Many policyholders see “we will provide a defense” and stop there. The more important part is usually what comes next: exclusions cited, factual issues flagged, reimbursement language inserted, or references to policy conditions that may become future denial grounds.
The ABA has noted that reservation letters do not automatically entitle an insured to independent counsel in every jurisdiction, because the real question is often whether the coverage issue overlaps with facts to be decided in the underlying case. That distinction matters. If coverage depends on facts defense counsel may influence, the reservation may be signaling more than a standard defense arrangement. ABA discussion of conflicts in the tripartite relationship.
This is why some policyholders later discover they were defending two cases at once: the liability case on the surface, and a coverage case quietly building in the background.
Common warning signs include: