House robbery markings
Most thieves who plan to break into a house want to know more about the homeowners’ personal life. They want to know who lives there, when they come and go, whether they have any security measures in place, etc. Another thing they want to know is how well-off the owners are. For this purpose, thieves have created their own unique secret code that they use to pass the information on to each other. This helps them to plan ahead and decide on a course of action for breaking into the house.
Mostly they draw some symbols on doors, garages, or on the facade of a home. So, what do these marks look like? What should you do if you see them on your house? Sure Lock & Key will answer these questions and help you decide on the necessary security measures that need to be taken.
What are house robbery markings?
- Circle: This one means that the house is an easy target. Most likely, it’s not equipped with any security devices.
- Triangle: This sign shows that a woman lives by herself in the house. Thieves target houses like that because they consider women weak and not able to stand up for themselves.
- Barred circle: It warns the thieves that the house has serious security measures, like cameras, an alarm, or a guard dog. So, it’s better not to even try breaking into that house.
- Lines that look like a ladder: That means that they saw some valuable items and that this house is worth breaking into.

- Cross: The owners of the house are religious people.
- Rectangle: This sign means that no one lives in the house.
- Three diagonal lines: This mark says that the house has already been burglarized.
- Also, criminals use letters to mark the best time of the day for a break-in. T – means empty during the day. M – better to break in the morning. N – the house is empty at night. They may combine these letters or add letters that point out the best day of the week for a break-in.

What do burglars use to mark the house?
Where are these burglar signs usually located?
What to do if there are markings outside your house?

