A check call is a scheduled welfare contact between a lone worker and their supervisor or control room. For security guards — especially those working alone on remote sites, overnight, or in higher-risk environments — check calls are one of the most important safety measures a company can put in place.
This guide explains what check calls are, what the law says, how to structure an effective check call system, and how technology is making the process faster and more reliable.
What Is a Security Guard Check Call?
A check call (sometimes called a welfare check or lone worker check-in) is a regular, timed contact to confirm that a lone worker is safe and has not encountered an emergency. If the guard fails to check in at the agreed time, it triggers a response procedure — typically an attempted callback, followed by escalation to on-call management or emergency services if contact cannot be made.
For security guards, check calls typically happen:
- At regular intervals throughout the shift (commonly every 30–60 minutes for higher-risk sites)
- At defined points in a patrol route
- When a guard encounters a potentially dangerous situation
- At the start and end of a shift (clock-in and clock-out)
The Legal Position on Lone Worker Safety
Under the Health and Safety at Work Act 1974 and the Management of Health and Safety at Work Regulations 1999, employers have a duty to assess and manage the risks faced by lone workers — including security guards.
The Health and Safety Executive’s guidance on lone working states that employers must:
- Assess the risks of lone working for each role and location
- Decide whether it is safe for work to be done by one person
- Put procedures in place to address the risks identified
- Ensure lone workers can raise the alarm in an emergency
- Monitor the well-being of lone workers throughout the working period
Check calls are not explicitly mandated by name, but they are the standard industry response to the monitoring requirement. If a lone security guard is injured, incapacitated, or in danger and your company has no check call procedure, you are exposed to serious liability.
The Security Industry Authority’s Approved Contractor Scheme (ACS) assessment also covers lone worker safety arrangements. Companies pursuing or maintaining ACS status should have a documented check call policy.
How Often Should Check Calls Happen?
There is no universal legal requirement for check call frequency — it should be determined by your risk assessment for each site. Factors to consider include:
- Site type and risk level. A static guard at a corporate office in daylight hours faces different risks to a guard patrolling a remote industrial site overnight.
- Whether the guard is alone. A truly lone worker (no colleagues on site, no public presence) warrants more frequent check-in.
- History of incidents. If a site has a record of confrontations or suspicious activity, shorten the check-in interval.
- Physical environment. Poor mobile signal, isolated buildings, or confined spaces increase the risk of a guard being unable to raise the alarm.
As a general starting point, many UK security companies use 30-minute intervals for higher-risk sites and 60-minute intervals for lower-risk locations. For very remote sites or night shifts with elevated risk, some companies use 15-minute intervals.
What Should Happen When a Guard Misses a Check Call?
Every company should have a documented escalation procedure for missed check calls. A typical process looks like this:
- Immediate callback attempt. As soon as the check-in window is missed, attempt to contact the guard by phone.
- Secondary contact. If no answer, try a secondary number (personal mobile, site phone if applicable).
- Supervisor or on-call manager escalation. If the guard cannot be reached within a defined window (commonly 5–10 minutes), escalate to an on-call manager.
- Emergency services. If the guard still cannot be reached and there is reason to believe they may be in danger, contact emergency services and provide the guard’s last known location.
The escalation steps and timeframes should be written down and communicated to anyone responsible for managing check calls. A procedure only on paper is not sufficient — the person managing the check is most likely doing so at 3am and should not have to work out what to do in that moment.
Check Calls vs Patrol Management: What Is the Difference?
These terms are sometimes confused. The key distinction:
Check calls are welfare contacts. Their purpose is to confirm that the guard is safe. They may happen at regular time intervals regardless of where the guard is within the site.
Patrol management involves verifying that a guard has visited specific checkpoints around a site. The purpose is operational — confirming the guard has physically covered the route and checked the right areas.
Both matter, and a good guard management system handles both. Check calls protect your guard; patrol management protects your client.
Managing Check Calls at Scale
For a small company with two or three guards, a supervisor can manage check calls manually — noting the time, calling when due, logging the response. For a company with 20, 50, or 100+ guards across multiple sites, manual management becomes impractical and unreliable.
Common problems with manual check call management:
- Missed calls when a supervisor is dealing with another issue
- No central log of check-in history that can be reviewed later
- No automated alert when a guard fails to check in — someone has to be watching the clock
- No audit trail for compliance or ACS purposes
How Technology Improves Check Call Management
Digital lone worker and guard management platforms handle check calls automatically, removing the reliance on manual monitoring:
Automated check-in windows. The system knows when each guard is on shift and expects a check-in at the defined interval. If the guard does not check in, an alert is triggered automatically.
Mobile check-in for guards. Instead of making a phone call, guards check in via an app. This is faster, creates a timestamped record automatically, and works when the guard is in a situation where a phone call is not practical.
Instant alerts for missed check-ins. Supervisors and on-call managers receive an immediate notification if a guard fails to check in within the window, rather than relying on someone watching a clock.
Full audit trail. Every check-in is logged with a timestamp. Management can see at a glance whether check calls are happening as required, across every site, for any date range.
Check Calls in TacDesk
TacDesk includes a check call module as part of its guard management platform. Guards check in via the TacDesk mobile app; supervisors and managers receive immediate notifications if a check-in is missed. A full log of all check-in history is stored and searchable.
This gives you:
- Automatic alerts for missed check-ins — no manual monitoring required
- A complete audit trail for every guard, every shift
- Evidence for ACS compliance and client reporting
- Integration with scheduling and GPS clock-in so your lone worker data is part of a single system
TacDesk charges from £1 per guard per month, with a lifetime price lock and no contracts or setup fees.
Key Takeaways
- Check calls are a legal obligation for companies with lone working security guards — not optional
- Frequency should be determined by a site-specific risk assessment, typically 30–60 minutes
- Every company needs a documented escalation procedure for missed check-ins
- Manual check call management is unsustainable at scale and creates compliance risk
- Digital check call management gives you automated alerts, audit trails, and integration with the rest of your operations
Talk to TacDesk about how we handle check calls and lone worker safety for UK security companies.