Lost Key Coverage: The Small Endorsement With a Big Bill Behind It
Losing one key to one office can mean rekeying an entire building. It is a five-figure loss from a two-dollar object, and standard general liability is not written to pay it.
- A single lost master key can require rekeying every lock it opens — often an entire building or complex.
- General liability may respond to third-party property damage, but care, custody and control exclusions frequently apply to a key entrusted to you.
- Lost key coverage — a small endorsement — pays rekeying, lock replacement and access card reprogramming.
- Cleaning companies, building services, property managers, pet sitters and home care providers have the highest exposure.
- Key control procedures cost nothing and reduce both the frequency and the size of the loss.
Why the number is so large
Commercial buildings use keyed systems where one key opens many locks. If a master or sub-master is lost, the security of the whole system is compromised, and the remedy is rekeying every affected cylinder — sometimes hundreds.
Add electronic access: a lost fob or card usually just gets deactivated, which is cheap. But a lost credential on a system without proper administration, or a lost programming card, can require reprogramming the system.
Property managers and landlords rarely absorb this. Their lease and vendor agreements put it on the party who lost the key, which is you.
Why general liability may not pay
General liability covers property damage to third-party property. A key in your possession sits in the middle of a well-known coverage gap: care, custody and control exclusions apply to property of others in your care, and a policy without a care, custody and control extension may decline.
There is also an argument about whether rekeying is "property damage" at all, since nothing was physically harmed — it is the loss of security. Carriers have used both arguments.
Lost key coverage removes the argument. It is a specific endorsement or a specific coverage part in a janitorial or building services package, and it names the loss it pays for.
Who needs it
Cleaning and janitorial companies, which routinely hold keys to multiple buildings. Building services and facilities contractors. Property managers and their vendors. HVAC and elevator service companies with mechanical room access.
Also the residential side: pet sitters, home care providers, house cleaners and property caretakers. The dollar amounts are smaller but the frequency is higher.
If your business holds keys or credentials to buildings you do not own, this belongs on your policy. It is usually inexpensive relative to the exposure.
Key control that reduces the claim
Number keys rather than labelling them with the client’s name and address — a lost labelled key is a security incident, not just a rekeying bill.
Maintain a signed log of who holds which key, with issue and return dates, and require return at termination. Most large key losses trace to an ex-employee, not to an active one.
Store keys in a locked cabinet at your office, not in vehicles overnight. Use lockboxes or electronic credentials where the client will allow it — electronic access converts a five-figure rekeying into a one-minute deactivation.
Report a loss immediately, to the client and to your carrier. Delay increases both the security exposure and the argument about what caused the loss.