Detecting Hidden Cameras – or Using Them Legally: What Tenants and Landlords Should Know
Travelers are increasingly reporting that they are discovering hidden cameras in vacation rentals and hotel rooms. But there's another side to this: Owners of vacation properties often face the question of how to protect their property – for example, during long periods of vacancy – without violating data protection or personal rights.
In this article, we'll examine both sides:
How do I, as a guest, detect a spy camera – and how can I, as an owner, operate a camera system legally?
1. Why Cameras in Private Accommodations at All?
Tenants fear espionage, while landlords often want to protect themselves against theft, vandalism, or unauthorized use. Systems like Blink, Ring, or Reolink make it easy to monitor properties remotely – sometimes even with sound and motion detection.
However: Not everything that is technically possible is also legally permissible.
2. How to Detect Hidden Cameras – As a Tenant or Guest
If you are traveling yourself, the rule is: Keep an eye out in your accommodation!
Many mini-cameras are hardly visible today – but with the right tips, they can often be tracked down.
a) Check WLAN Networks
Most surveillance cameras connect to the WLAN. With the help of apps like:
- Fing (iOS/Android)
- Engelmann Forensic System (for network monitoring)
you can see which devices are connected to the network. Unknown or generic names like "IPCam" or "Camera_xx" should make you suspicious.
b) Detect Lenses with Light
In a darkened room, many lenses light up when exposed to direct light:
- Darken the room
- Hold a flashlight parallel to eye level
- Slowly shine it into mirrors, smoke detectors, or devices
A reflection – similar to a cat's eye – can reveal a lens.
c) Make Infrared Light Visible
Many cameras use IR LEDs for night vision. The front camera of your smartphone can often make IR light visible. In a dark room, active IR LEDs glow slightly violet or white.
d) Use a Bluetooth Scanner
Some cameras use Bluetooth for data transmission. Apps like BLE Scanner show devices within range. Unknown or unnamed devices are potentially suspicious.
e) Check Hidden Locations
Typical hiding places:
- Smoke detectors (often with a view of the bed)
- Alarm clocks, speakers, USB chargers
- Picture frames, plants, lamps
- Decorative objects with a conspicuous drill hole
Real Case: Camera in Power Adapter
A guest in Paris in 2023 discovered a camera in the USB charger by the bedside. When trying to use his own cable, he noticed the unusual weight. Inside, he found a functioning camera with an SD card.
3. What to Do if You Discover a Camera?
- Do not manipulate or cover it before securing evidence
- Take photos and videos for documentation
- If possible: Disconnect the camera from power or log it off the WLAN
- Leave the accommodation if you feel uncomfortable
- Contact the platform operator (e.g., Airbnb)
- If illegal surveillance is suspected: Call the police
- Do not damage the camera – this can be legally problematic
4. Landlord's Perspective: Legally Using Cameras
Yes, you may protect your property – but not spy on your guests.
Those who protect their property, e.g., with Blink, Ring, or Reolink cameras, must adhere to the following basic rules:
a) Only Monitor Public Areas
Cameras may, for example, film the entrance area or the front door – but not the interior once it is rented out.
b) Provide Clear Notices
Indicate in your house rules, listing, or on-site:
“This accommodation is video-monitored in the entrance area.”
c) Deactivate Indoor Cameras During Rental
If you have cameras installed in the living room or hallway, you must visibly switch them off or physically cover them when guests are present. A small icon in the app is not enough.
d) No Sound, No Hidden Recording
Audio recordings are more restricted in many countries than video. Even if your camera records quietly and invisibly – this is generally forbidden in rented rooms.
How is this done with systems like Blink?
Blink cameras can, for example, be:
- deactivated in the app
- scheduled
- limited to motion detection
- indicated as active or inactive by LED light (recommended!)
A best practice would be, for example:
“All indoor cameras are switched off during the rental period. The camera at the entrance remains active and serves exclusively for access control.”
5. What Does the Law Say? (Disclaimer)
Legal Disclaimer: This article is for general information purposes only and does not constitute legal advice. The legal situation regarding surveillance and data protection is subject to continuous change. New rulings, national special regulations, or EU directives may influence the legal assessment. For binding evaluations, please contact a qualified legal professional.
6. Conclusion: Use Technology – But with Discretion
Whether tenant or owner: Modern camera systems can provide security – but they must not violate privacy.
- Those who, as guests, know how to detect hidden cameras actively protect themselves.
- Those who, as landlords, act responsibly protect their property and remain legally on the safe side.
With tools like the Engelmann Forensic System, clever procedures, and the right amount of attention, you are well-equipped – whether as a tenant or landlord.
