What is the current alt.locksmithing recommended maximum time to go without changing a safe combination? Of course, if someone who may have had access to the combination, and/or safe itself leaves the company, then that is probably a good time to change it, but if no such excuses existed, what then?
where is the safe? home or business? who has access to combo, or better yet HOW MANY? past that ..EVERYTIME someone is added or let go at a business would be MY thoughts..
drilled a floor safe once- 'company policy' said change every time new store manager or ever 6 months.. it hadnt been changed in 6 YEARS. loose screw on the back, caused 3 relockers.. the screw HEADS were worn off slic, due to constant use sliding on the floor. --Shiva--
I heard that a New Zealand bank had someone go round all branches every 6 months to change the combinations, presumably to turn the change key and check that the bank staff had done it right.
IMO a combination should also be changed if someone who had 'daytime' access to a safe or its immediate area leaves under suspicious circumstances.
A theft involving a 'clean opening' casts grave suspicion on those who hold the combination, so if those people have any concerns, the combination should be changes. Unfortunately there is gross carelessness with combinations including having it written next to the safe etc.
Conversely if a safe is taken out of service for sale etc it would seem wise to set the combination to the usual 'factory' setting so that it is easily opened by whoever uses it next.
The lock should probably be *inspected* on a yearly basis. And changing the combo is often free with a proper inspection. A warranty may also be included in that price.
Failing that: Depends on how many have had the combo and how much you trust them; also depends on whether other folks have had the opportunity to play with/observe the safe and possibly determine partial combinations. If nobody knows the combo but you, and nobody has ever been able to play with it or watch you operate it, your existing combo is (one hopes) as good as any other.