We bought an apartment - is it worth changing the locks after receiving the keys?

The client's name has been changed.

Let's call the client Alexey. He received the keys to the new apartment and asked:

“If the seller gave me all the sets, why change the lock?”

Because it is impossible to know with absolute certainty the history of all copies.

In an apartment from the secondary market

The keys could once have:

• previous tenants;
• relatives;
• tenants;
• masters;
• cleaning;
• neighbours.

This does not mean that any of them pose a threat. The new owner simply does not control the access history.

And in a new building?

The keys could be located at:

• developer;
• contractors;
• repair teams.

Again, the issue is not about accusations. The question is whether you want to start owning an apartment with a new controlled kit.

Is it necessary to change the entire lock?

No. In a cylinder system, it is often sufficient to replace the cylinder. This allows you to:

• keep the lock body in good working order;
• get a new set;
• terminate previous keys.

Is it necessary to change a good expensive mechanism

If it suits the condition and level of protection, it is not necessary. First you need to understand the design.