us Personal safety & immediate danger someone trying to follow you in • tailgating into apartment building • piggybacking through secure door • stranger entering shared entrance • unknown person in apartment lobby • apartment building unauthorized entry • someone pushing through door • suspicious person at building entrance • person without key fob • delivery person without access • letting a stranger in behind you • someone trying to get into building • shared building door security • feeling unsafe in hallway • refusing entry politely • building access control • possible trespasser at door • resident safety at entrance

What to do if…
you see someone attempting to enter a shared building behind residents without permission

Short answer

Don’t let them in. Step back, let the door close and lock, and move to safety; if you feel threatened or it looks like a crime in progress, call 911.

Do not do these things

Don’t hold the door open or use your key fob/code to grant access for them.
Don’t step into an elevator, stairwell, or enclosed corridor with them.
Don’t physically block, grab, or try to detain them—step back and call for help instead.
Don’t escalate with close-range arguing or repeated back-and-forth.
Don’t follow them through the building if they slip in.

What to do now

Make space and keep a barrier. Step back and let the door close/lock. If you’re inside, move back toward the lobby/entrance rather than deeper into the building.
If another resident is about to let them in, warn them briefly (from a safe distance). Example: “Please don’t hold the door—don’t let people tailgate in.” Then disengage.
Use one firm, neutral boundary (optional). From a safe distance: “I can’t let anyone in—please use your own key or contact the resident you’re visiting.” Say it once, then stop engaging.
Redirect them to the proper access method. Tell them to use the call box/intercom, check in with the front desk/security, or contact the leasing office/property manager—without you granting entry.
If you feel unsafe or it appears urgent, call 911. Get to a safer spot first (outside, behind a locked door, or into a nearby business). Give the dispatcher the address, where the person is, what they’re doing, and a description.
If it’s suspicious but not urgent, use the non-emergency route. Quickly search “police non-emergency” + your city/county, check lobby signage, or use your city/county website. If you can’t find it fast and you feel at risk, call 911 and explain it’s a suspicious-person/building-entry situation.
Record details only if it won’t escalate things. Time, clothing/appearance, direction of travel, and any vehicle details—then stop and focus on safety.
Notify building management right away. Report the incident to the property manager/HOA/concierge and flag any door that isn’t latching/locking reliably as urgent.

What can wait

You don’t need to determine their intent or “prove” they weren’t allowed in.
You don’t need to confront them, lecture them, or chase them down the hall.
You don’t need to decide right now what long-term security upgrades should happen—just report what you saw and any broken door/access hardware.

Important reassurance

It’s common to feel awkward refusing someone at the entrance. In controlled-access buildings, not letting unknown people tailgate is a normal safety boundary.

Scope note

These are first steps for the moment you notice someone trying to enter behind residents. If it keeps happening, document dates/times and keep reporting to management and local law enforcement as appropriate.

Important note

This is general information, not legal advice. If you believe there is immediate danger or a crime is in progress, call 911.

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What to do if…you see someone attempting to enter a shared building behind residents without permission