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Articles·Security guard·Technique and method

Access control, search and seizure in practice

From key and access card to biometrics — and where the limit of your examination rights lies

Access control is the task that most security guards encounter on the first day: to decide who is allowed to enter, where and when. It sounds simple, but behind a simple door-opening lies a system of technology, procedures and legal boundaries that you as a security guard must know and be able to handle correctly — every time, not just when it's easy.

§From key to biometrics

The classic access methods are still in use: the physical key and the mechanical lock. But in most modern workplaces access cards security tokens and PIN codes have taken over the role because they can be blocked and given rights individually and because each use is typically logged. In more highly secured places you also see biometric solutions such as fingerprint or face recognition often combined with card or code in a two-factor system. As a guard it is rarely you who chooses the system but you must know its logic: when a door opens automatically when it requires manual release and what you do when the technology fails.

§Visitation and search — what does it involve?

Visitation and search of persons and vehicles is part of the syllabus on the AMU course Basic Security which is the ticket to the security profession — here you learn systematic review of bags vehicles and carried items at access control on e.g. construction sites warehouses and events. But it is crucial to understand that this does NOT give you police search rights. A security guard acts on the basis of the same rights as any other citizen and can therefore only examine bags vehicles and pockets when the person voluntarily gives consent — typically because it is a condition for access to the place (e.g. a workplace or an event).

§Tailgating and access discipline

The weakest link in many access systems is not the technology but habit: one person following close behind another through a door that just opened (tailgating) without legitimizing themselves. A guard standing post at an entrance must actively prevent this — kindly but consistently — because a system where everyone can follow everyone really doesn't control anything.

  • 01Always ask for independent identification or card, even with familiar faces, if the procedure requires it.
  • 02Follow up if a door is held open too many times at once.
  • 03React to technical error messages immediately – an error message that is ignored is an open door.
  • 04Know the difference between guests, suppliers and employees, and the rules that apply to each group.

§Logging and documentation

Access systems typically log who used which card when. That log is valuable in a subsequent incident, but it also contains personal data and must therefore be treated confidentially and stored according to the rules your workplace has established. If the venue combines access control with camera surveillance, the rules for TV surveillance also apply, which you can read more about in the article on GDPR and TV surveillance.

System typeExampleTypical use
MechanicalKey and lock.Fewer locations, backup access
Map-basedAccess card, access fobOffices, warehouses, industry
Code-basedPIN code on panelShared access, temporary access
BiometricFingerprint, facial recognitionHighly secured areas often in combination

The best access system is only as strong as the guard who enforces it consistently every single time.