Letterbox burglary — also known as “key fishing” — is a quick and silent way for intruders to gain entry to your home. Using simple tools, burglars can reach through an unsecured letterbox to hook keys, unlock doors, or even steal valuables within arm’s reach.
In this guide, we explain why letterbox burglary happens, the most effective ways to prevent it, and the security upgrades that give you the best protection.
🔍 What Is Letterbox Burglary and Why It Matters
Burglars often target homes with standard, unprotected letterboxes because:
-
Keys are left within easy reach
-
The flap opens wide enough for a hand or tool to pass through
-
There’s no internal barrier to block access
It’s a fast, low-noise method that can bypass other security measures.
🔐 Best Ways to Prevent Letterbox Burglary
1. Keep Keys and Valuables Out of Sight
-
Never leave keys on a hall table or hooks near the door.
-
Store spare keys in a lockable key safe away from the entrance.
2. Install an Anti-Burglar Letter Plate (TS008 Compliant)
-
Reinforced plates with limited flap opening reduce the risk of fishing.
-
Look for TS008 compliant models, which meet high UK security standards.
🔗 Browse our anti-burglar letter plates.
3. Fit a Letterbox Restrictor or Draught Excluder
-
Restrictors reduce flap opening to a narrow gap.
-
Nylon bristle excluders provide airflow control while blocking access.
4. Consider an External Lockable Mailbox
-
Removes the letterbox from the door completely.
-
Collects mail securely, ideal for properties with higher risk or longer absences.
5. Choose Fire-Resistant Models for Added Safety
-
Helps prevent arson attempts through the letterbox.
-
Available in both internal and external mailbox designs.
📋 Additional Security Tips
-
Fit a door viewer so you can check visitors before opening.
-
Install a chain or limiter to prevent forced entry when answering the door.
-
Combine with a high-security euro cylinder lock for complete protection.
❓ Frequently Asked Questions
Q: What is “fishing” through a letterbox?
A: It’s when burglars use a tool to hook keys or valuables through an unsecured letterbox.
Q: Are anti-burglar letter plates worth it?
A: Yes — they limit flap movement and add an extra security barrier.
Q: Will a letterbox restrictor fit any door?
A: Most models fit standard letterbox sizes, but always check measurements before buying.
🏠 Secure Your Letterbox Today
Don’t let your front door be an easy target. Protect your home with an anti-burglar letter plate, restrictor, or external mailbox.
