What is a URN and how do I get police response for my alarm?

The URN is the link that makes police response possible, but it comes with conditions. The points below explain what it is and how one is obtained.

What a URN is and what it does

A URN is a unique code held by the police that identifies your specific alarm installation in their systems. Its purpose is to enable a fast, verified police response: when your alarm activates and the ARC determines the activation is confirmed, the operator contacts the police control room and quotes the URN. That reference instantly tells the force which property the alarm relates to, that it is an approved, compliant installation, and that a confirmed activation has occurred — the basis on which attendance is requested. Without a URN, an alarm cannot trigger police response; it can only sound or alert keyholders.

The URN is tied to the property and its installation, not to you personally. It records the alarm's compliance status and its false-alarm history, both of which the police track. This is why the URN is more than a number: it represents the standing of your alarm in the police response scheme, and that standing can change if the system falls out of maintenance or generates too many false alarms. Understanding the URN as a maintained privilege rather than a permanent entitlement is the key to keeping police response.

The URN sits within a national framework rather than being a local arrangement. UK police forces operate a common security systems policy governing how alarms earn and keep response, administered consistently so that approved installers and ARCs across the country work to the same rules. Your URN is registered with the force covering your property, linked to the approved installation and to the ARC that monitors it. This framework is what lets an ARC operator in one part of the country reliably request a response from a force elsewhere — the URN is a recognised, standardised reference, not an informal note.

A URN is issued by the local police force, not by the alarm company, and it is tied to a specific installation that meets the force's conditions. To obtain one, the system must be installed and maintained by an NSI or SSAIB approved company, use confirmed-activation signalling, and be registered with the force, usually for a one-off application fee. The number then identifies that property to the police control room, so when the ARC calls in a confirmed activation quoting the URN, the force can attribute it to a compliant system and grade the response accordingly.

What obtaining and keeping a URN involves in the UK.

How to get a URN

You do not apply for a URN yourself. The process runs through your approved alarm company. First, the alarm must be installed to a recognised standard — typically EN 50131 — by an NSI or SSAIB approved installer, with confirmed-activation signalling so that the system can distinguish a real alarm from a single false trigger. The installer then applies to the relevant police force for a URN on your behalf, providing the installation details and confirming compliance.

There is usually a one-off police administration fee for issuing the URN, which the installer or monitoring provider passes on. Once granted, the URN is linked to your monitoring contract with the ARC, so the centre can use it when reporting confirmed activations. In practice, getting a URN is simply part of commissioning a police-response monitored system through an approved company: choose an NSI or SSAIB installer, specify police-response monitoring, and the URN application is handled within that process rather than as a separate task you do yourself.

The URN matters because it is the only route to a prioritised police response from an alarm. Without one — on a bell-only or self-monitored system — a triggered alarm cannot summon police; the most you can do is call 999 yourself as a member of the public reporting a possible crime, which is graded on its own merits. With a URN and a confirmed activation, the ARC's call carries the weight of a verified, approved system, which is why police are willing to attend. The URN is, in effect, the credential that turns a monitored alarm into one police will respond to.

Keeping a URN active

Obtaining a URN is only half the story; keeping it requires ongoing compliance. The alarm must remain maintained by an approved company, usually under an annual maintenance contract, because the police scheme is built on the system continuing to meet its standard. A lapsed maintenance contract can put the URN at risk, since the police rely on the installer's confirmation that the alarm is serviced and reliable.

The other condition is the false-alarm record. Police forces operate a policy that monitors each URN for unconfirmed activations, and a system that generates too many within a rolling period can have its police response withdrawn. The alarm then reverts to keyholder-only response until the cause is fixed and the URN reinstated, often after a clear period. This is why proper commissioning, sensible sensor placement and prompt fault repair matter: they keep the false-alarm count low and the URN — and the police response that depends on it — intact.

Reinstating a withdrawn URN follows a defined route rather than being automatic. If police response is suspended after repeated false alarms, the alarm company typically must investigate and rectify the cause, demonstrate the system is reliable again, and apply for reinstatement, often after a clear period with no further false activations. During suspension the alarm still works and still alerts keyholders through the ARC — only the police element is paused. Knowing this process exists is reassuring, but it underlines why preventing false alarms in the first place, through good commissioning and maintenance, is far easier than recovering a lost URN.

It is worth knowing how a URN can be lost and reinstated, because that is where the false-alarm policy bites. If a system generates repeated unconfirmed activations within a rolling period, the force can suspend police response on that URN; the alarm still works and still calls keyholders, but police will not be dispatched until the installer has identified and corrected the cause and the URN is reinstated. This is why an approved company's maintenance and prompt fault-fixing matter so much: keeping false alarms down is what keeps the URN — and the police response it provides — live.

Frequently asked questions

Sources & further reading

• NSI — police response and URN requirements
• SSAIB — approved installers and monitored alarms

Figures on this page are typical UK ranges drawn from published sources and depend on your specific property and system. They are guidance, not a quotation.