Category: Claims handling · Reviewed by Jake Leat, Associate Director · Last reviewed 2026-06-11
A reservation of rights letter (ROR) is a written notice from an insurer to its policyholder stating that, while the insurer will conduct or contribute to the defence of a claim, it does so without admitting cover, and reserving the right to decline or to recover defence costs if cover is later found not to attach.
The ROR is the principal tool by which an insurer reconciles two competing commercial demands: it cannot leave a policyholder undefended in the face of urgent litigation, but neither can it commit indemnity capital before coverage is resolved. The letter is the device that allows the insurer to instruct counsel, fund defence costs and engage in settlement discussions, all without losing its right to decline cover or seek reimbursement once the coverage analysis is complete.
In English practice the ROR is most often used in three situations: where there is a genuine coverage issue still under investigation (a possible late notification, an arguable exclusion, a contested aggregation point); where the policyholder is facing urgent procedural deadlines that the insurer cannot allow to lapse; and where the policy contains multiple sections and only some respond. The letter is normally drafted by the panel solicitor on the insurer’s instructions and is sent by the insurer (or its claims handler) directly.
There is no statutory rule on RORs in English law. The doctrine is grown out of common law on waiver and estoppel. An insurer that defends a claim without reserving its position may be held, by election or estoppel, to have waived its right to decline — particularly if the policyholder has acted to its detriment in reliance on the insurer’s conduct (for example, by foregoing alternative coverage, or by allowing the insurer to take control of the defence). The leading authorities are Kosmar Villa Holidays plc v Trustees of Syndicate 1243 [2008] EWCA Civ 147 and Insurance Corporation of the Channel Islands Ltd v Royal Hotel Ltd [1998] Lloyd’s Rep IR 151.
A properly drafted ROR avoids the waiver/election problem by stating clearly that the insurer is not making any final coverage decision, that its conduct in funding defence or participating in settlement should not be taken as an admission, and that it reserves the right to revisit cover and to seek recovery of any sums paid if cover is found not to respond. The ROR will typically also reserve the insurer’s right to be involved in defence strategy, to appoint or replace counsel, and to consent (or refuse consent) to any settlement.
Under the FCA’s Insurance Conduct of Business Sourcebook (ICOBS 8) and the Consumer Duty (PRIN 2A), the ROR must be expressed in clear and accessible terms. A consumer policyholder receiving a ROR is entitled to understand exactly what is being reserved and what the practical consequences may be. The FOS has repeatedly criticised insurers that send opaque or boilerplate RORs.
A well-drafted ROR has six elements. First, it identifies the policy, the claim and the date of notification. Second, it sets out the specific coverage issues the insurer is investigating — without overstating them. Third, it states that the insurer will (or may) fund defence costs and participate in defence on a without-prejudice basis. Fourth, it reserves the right to decline cover and to seek reimbursement of defence costs if cover is found not to respond. Fifth, it gives the policyholder the opportunity to instruct independent coverage counsel and confirms that the insurer will not be entitled to read privileged communications between the policyholder and that independent counsel. Sixth, it sets out the next steps — typically a coverage opinion or further investigation, with a timetable.
In commercial business, RORs are commonly paired with non-waiver agreements: a formal contract under which the policyholder accepts the reservation in exchange for the insurer continuing to fund defence. The non-waiver agreement is more robust legally than a one-sided ROR because it contains the policyholder’s express acknowledgement.
Operationally, RORs are tracked in the claim file with a calendar entry for the date by which the coverage position will be resolved. An ROR that drifts open indefinitely creates risk for the insurer: a court or arbitrator may find that the insurer’s continued defence amounts to waiver in fact, regardless of what the letter says. Best practice in the London market is to resolve the coverage position within 90 days of issue unless there is a compelling reason for delay.
A “qualified” ROR reserves only specific points (for example, only the late-notification condition). A “general” or “blanket” ROR reserves the right to decline on any ground, which is legally weaker because courts may find it has not given fair notice of any particular point.
A “fund-and-decline” ROR is used where the insurer is willing to fund defence costs to closure but reserves the right to decline indemnity for the settlement or judgment. A “defend-and-decide” ROR reserves both points but commits to a coverage decision within a specified period.
A “withdrawal of reservation” follows when the coverage position is resolved in the policyholder’s favour. A “conversion of reservation” follows when the insurer decides to decline cover formally — at which point the ROR becomes a denial letter and the policyholder may seek independent counsel and start the dispute process.
A solicitors’ firm faces a £1.8m professional indemnity claim with a contested late-notification issue. The insurer issues an ROR on day 14 of the claim stating that it is investigating whether notification was within the “as soon as reasonably practicable” requirement of the claims condition, and whether section 11 of the Insurance Act 2015 prevents reliance on that condition in any event. The insurer commits to fund defence costs and to provide a panel solicitor, on a without-prejudice basis, but reserves the right to seek reimbursement if cover is found not to attach. Sixty days later the insurer’s coverage opinion confirms that section 11 prevents reliance on the late-notification condition (the late notification did not increase the risk), and the insurer withdraws the ROR by letter, confirming cover unconditionally.
By Matt Bartlett, Director, on 2026-06-11. Next review: 2026-12-11.
This entry is part of the Apex Insurance Wiki. Last reviewed by Matt Bartlett on 2026-06-11. Apex Insurance Brokers Limited, FCA FRN 724952, Companies House 07014570. Not regulated advice — consult your broker on your specific position.
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