Don’t allow strangers on your premises or in your house without having properly identifying the person, especially at night.
Implement proper key control measures.
Identify keys by means of codes instead of indicating in writing on labels to which gate/door access can be gained. E.g. Main gate- Code A.
Keys to the safe must be kept on the person. Never hide any keys in traditional places, such as in pot plants or under doormats.
Keys in the keyhole on the inside of the front or back door should be turned to avoid easy removal. It’s advised to remove them when not there. Intruders like to enter in a window and leave with all the keys from doors. Never allow strangers to handle keys or look at key numbers. Change locks when keys are lost, it does cost, but it must be done. Insert barring devices in door locks.