Locks and alarms become conditions the moment they earn a discount

The options around security warranties are set out side by side below, with the conditions that genuinely favour one over the other.

Why insurers price security at all

Theft claims cluster in properties that are easy to enter quickly, so the quality of locks and doors genuinely changes the risk. Insurers translate that into a discount, and the discount is calculated on the assumption that the declared security exists.

Because the assumption is priced, it stops being a description of your house and becomes a term of the contract. That is the step most people miss: answering a question about locks creates an obligation to maintain what you described. The obligation runs for the whole policy year, not just for the moment the quotation was produced.

What a lock specification actually means

Wordings often refer to a technical standard for door locks rather than to a description anyone would recognise. Meeting the standard is about the mechanism and its certification, not about how solid the door feels from outside.

Where it helps most, window locks are frequently included in the same condition, and are the ones most commonly left unfitted or unused. Where a wording specifies a standard, a locksmith can confirm in minutes whether your existing locks satisfy it. Replacing non-compliant locks is usually cheap relative to the discount and vastly cheaper than a declined theft claim.

Alarm conditions are stricter than lock conditions

An alarm condition normally requires the system to be maintained under contract, in working order, and set whenever the house is empty. Monitored alarms carry the further condition that the monitoring contract remains live, which is easy to let lapse quietly.

A system that is disconnected because it kept triggering is a breach even though the intention was entirely reasonable. Some conditions apply only overnight or only when the property is unoccupied for a period, so read which version applies. The practical test is whether you could show, after a burglary, that the system was serviced and set as described.

What happens after a breach

Where security was declared and not maintained, an insurer may decline the claim or reduce it, depending on local law and wording. In some jurisdictions the insurer must show the breach was relevant to the loss, and in others a strict warranty needs no such link.

On an ordinary week, that difference is significant, because it decides whether an unlocked window matters to a theft through the front door. Consumer protection rules in several markets have softened strict warranties, but the position varies and cannot be assumed.

The safest approach is to treat every declared security measure as a condition that must actually be in use.

Keys and the human element

Most theft conditions exclude entry gained with keys left in an obvious place, such as under a mat or inside a porch. Keys left in a door lock, in a visible bowl, or with a tradesperson can convert a covered theft into an excluded one. The same principle appears in motor wordings, where theft using keys taken from the house is treated with equal suspicion.

Where it helps most, changing locks after losing keys is usually sensible and is sometimes covered as a small benefit under the policy. These conditions are aimed at the easiest entry routes rather than at unusual or determined attacks.

Some of this will suit you and some will not, and that is the point.

Keeping yourself covered

Read the schedule for any security endorsement, since conditions imposed at quotation appear there rather than in the general wording. Keep alarm service records and lock invoices, because they are the evidence that supports what you declared. Tell the insurer if the alarm is removed, if the monitoring contract ends, or if a door is replaced with a lesser lock.

Ask whether the discount survives the change, since paying slightly more is preferable to holding cover that may not respond. Requirements differ substantially between insurers and countries, so verify against your own documents rather than a general summary.

Side by side

The takeaway

Anything you declared about locks, alarms or monitoring is now a term you must keep; treat the discount as a promise rather than a gift.

The version you keep doing is the version that works.