Tailgating

Tailgating uses an authorised person’s access to move an unauthorised person through a controlled entry point. The entry path depends on human behaviour around doors, lifts, gates, reception areas, and other physical boundaries rather than direct defeat of the access mechanism.

Timing, confidence, politeness, distraction, and social discomfort can reduce the likelihood of challenge. An individual who appears familiar with the environment or moves with an authorised group may be assumed to belong before access has been established.

Workplace habits can reinforce the opportunity. Group entry, held doors, busy access points, and informal assumptions about visitors create conditions in which the required badge, reception, escort, or verification process is bypassed.

How it appears

Tailgating can occur as a close follow-through, group entry, friendly interaction, or staged reason for avoiding the normal access process. The person may wait near a controlled boundary, move behind an authorised entrant, or present an explanation only when challenged.

Apparent legitimacy is often carried through behaviour and context. Work items, uniforms, deliveries, confident movement, or a claimed host can make the person appear expected despite the absence of individual authorisation.

Element	What it means	Examples
Access point	The controlled entry location being used.	Swipe door, lift lobby, secure floor, loading dock, staff entrance, car park, restricted area.
Entry behaviour	The movement used to enter without completing the expected access process.	Following closely, joining a group, slipping through a held door, entering a lift after another person.
Legitimacy detail	The appearance or contextual detail that makes the person seem to belong.	Confidence, laptop bag, tools, delivery item, uniform, phone call, visitor paperwork, familiar manner.
Social pressure	The interpersonal condition that reduces challenge or interruption.	Politeness, fear of seeming rude, busy entrance, group movement, apparent seniority, awkwardness.
Claimed reason	The explanation presented for presence or entry.	Forgotten badge, meeting a host, delivery, maintenance task, working on another floor, running late.
Exploited condition	The access condition the entrant relies on to keep moving.	Held door, busy entrance, unstaffed reception, no badge check at the point of entry, no escort in place.

Indicators

Tailgating indicators are usually observable at the access boundary or during subsequent movement through the site. The relevant inconsistency is between the person’s behaviour and the access process expected at that location.

Indicator	What to look for
No individual badge use	A person passes through a controlled door, turnstile, lift, gate, or secure entrance without using an individual access credential.
Waiting near access points	A person lingers near doors, lift lobbies, car park entries, staff entrances, or loading docks until another entrant opens the way.
Visitor process bypass	An unfamiliar person avoids reception, sign-in, visitor badges, host confirmation, escort requirements, or security checks.
Forgotten badge claim	A person claims that a badge is forgotten, lost, damaged, or unavailable while avoiding the established temporary access process.
Unclear host or purpose	A claimed meeting, delivery, job, or site task cannot be linked clearly to a host, location, or approved process.
Unescorted movement	A visitor, contractor, courier, cleaner, technician, or unfamiliar person moves through areas where escort requirements apply.
Defensive reaction	Direction to reception or security produces irritation, evasion, dismissiveness, or disproportionate pressure to continue.
Group entry ambiguity	A person blends into a group moving through a controlled entrance without clear association with the group or independent authorisation.
Movement towards sensitive areas	An unfamiliar or unauthorised person attempts to reach staff-only, records, infrastructure, executive, or operational areas.
Repeated boundary testing	The same person or access pattern appears across multiple entry points, floors, reception areas, car parks, or controlled spaces.