Disputes6 min read·1 July 2026

Guest Lost the Keys or Smart-Lock Fob: How to Charge for a Rekey

A guest messages from the airport to say they think the keys are in the taxi. The keys themselves cost a few pounds. What follows does not: a locksmith call-out, a cylinder change, new keys cut for the cleaner and the co-host, and in an apartment building, possibly a fob that is part of a system you do not control. This is the claim where the cheap item generates the expensive obligation.

Short answer: you are claiming the security cost, not the key. A lost key to an occupied rental means the lock has to be changed, because the next guest is entitled to a property whose keys are not in circulation. That rekeying invoice is the claimable amount, and it is entirely defensible.

What is not claimable: the upgrade. If you take the opportunity to fit a smart lock, claim the equivalent cost of replacing what was there, not the improvement.

Why the rekey is a duty, not a choice

The reason this claim holds up is that you have no reasonable alternative. A key attached to nothing, lost in a city, is a low risk. A key lost by someone who knows the address, or a fob that opens a building entrance, is a different matter, and continuing to let the property with that key unaccounted for is a decision you would have to defend if anything happened afterwards.

State that reasoning in the claim in one sentence. Reviewers accept costs that follow necessarily from the incident far more readily than costs that look discretionary, and “the cylinder was changed because a key to an occupied short-term rental was unaccounted for” is about as clear a necessity as hosting produces.

What the incident actually costs

Line	Claimable	Note
Locksmith call-out and cylinder change	Yes	The core of the claim. Invoice it, do not estimate it
Out-of-hours premium	Usually	Justify it if the next check-in made it unavoidable
New keys cut for cleaner, co-host, owner	Yes	Itemise the number, keep it proportionate
Building fob or access card replacement	Yes	Charged by the management company, so there is paperwork
Master-key system reprogramming	Sometimes	Can be very large. Get the managing agent’s invoice
A smart-lock upgrade you chose to fit	No	Claim the like-for-like cost only
Nights lost if you could not turn the property over	Rarely	Only if genuinely unlettable, with the calendar to show it

The betterment line is the one that gets claims reduced. Fitting a keypad lock after a lost key is a sensible operational decision and a poor claim line, because you end up with a better asset than you had. Claim the replacement cost of the original, absorb the difference, and treat the upgrade as what it is: prevention you bought for yourself.

Handle the guest before the locksmith

Ask, in the platform thread, for a plain account: when they last had the keys, where they think they were lost, and whether anything identifying the property was attached to them. That last question matters. A key on a plain ring is a lower risk than a key on a fob labelled with the flat number, and the answer shapes both how urgently you act and how the cost reads.

Keep the exchange calm and factual. Most guests who lose keys are embarrassed and many will offer to pay before you ask, which is the ideal outcome: a voluntary payment resolves it without a claim at all. Where you do have to ask formally, the Resolution Center request comes first and the guest has 72 hours to pay, dispute or ignore it before you can escalate. The mechanics are in the Resolution Center guide, and the tone that works is in guest communication templates for damage claims.

That broken item cost more than the repair bill

Lost nights, your own time, and the part AirCover never repays add up fast. Estimate the real cost of a guest-damage incident and watch the true number climb as you fill it in. Free, no sign-up required.

Estimate My Real Cost, Free

The evidence is unusually easy here

Compared with a scratch or a stain, this claim is simple, because everything is documentary. There is no before-and-after photography problem and no wear-and-tear argument available to anybody.

The message thread where the guest reports the loss, which is effectively an admission.
The locksmith or managing agent invoice, dated, itemised.
A note of how many keys were issued at check-in and how many were returned.
Photographs of the key set at handover, if you use a key-count record.

That last item is the one worth adding to your process. A single photograph of the keys handed over, or a line in the check-in record stating how many were issued, closes the only argument available: that there was only ever one key and it is in the lockbox. The general habit is covered in the check-in inspection.

Filing it

Standard deadline: within 14 days of checkout, or before the next guest checks in, whichever comes first. Attach the invoice and the message thread, describe the sequence in three sentences, and ask for the documented total rather than a rounded figure.

Expect this one to be paid more often than most, because it is invoiced, necessary and uncontested on cause. The Guest Damage Cost Estimator will still be useful for the building-system cases, where a fob replacement can be an order of magnitude larger than a cylinder change and worth knowing about before you talk to the guest.

The version of this incident that costs nothing

Keyless entry removes this claim from your life. A keypad or smart lock with a per-stay code means nothing physical circulates, the code dies at checkout, and a guest who loses their phone has lost nothing of yours. For most single-property hosts it pays for itself the first time it prevents one call-out.

If a physical key is unavoidable, three habits reduce the damage: never put the address or flat number on the keyring, keep a spare cylinder and a locksmith’s number in your operations notes so a change is routine rather than an emergency, and state the replacement cost in your house rules so the charge is expected rather than argued. House rules that prevent damage covers the wording, and the prevention playbook puts it alongside the rest of the standing set.

A note on the other direction: a lock that fails, or a door forced because a guest could not get in, is a different incident with a different owner. That one is covered in forced entry or a broken door lock.

The honest summary

Lost keys are one of the cleanest claims in hosting: cause is admitted, the cost is invoiced, and the rekey is a necessity rather than a preference. Ask the guest what was attached to the keys, change the cylinder, claim the like-for-like cost, and leave the upgrade off the invoice.

Then consider whether you ever want to have this conversation again. A keypad lock and a per-stay code make the entire scenario impossible.

Record what was handed over, not just what came back

Checkout Shield documents every check-in and checkout as a GPS-verified, timestamped report. Key counts, access notes and property condition are on the record, so a lost-key claim rests on documentation rather than recollection.

Create Your First Verified Report, Free

Free tools for Airbnb hosts

Guest Damage Cost Estimator

A broken item never costs only the repair bill. Estimate the real cost of a guest-damage incident, including lost nights, your own time, and the part AirCover never reimburses. Watch the true number climb as you fill it in. Free, no sign-up required.

Estimate my real cost