Landlords and tenants should always think about property security.
One healthy habit is to replace the locks after a tenant moves out. Unfortunately, this adds an extra cost to the property maintenance budget, and this task is often avoided.
On the other hand, tenants are so excited about the new place that they forget or do not want to create friction with the landlord and this topic falls under the table.
The truth is that the previous tenant may keep a copy of the key to the property. The previous tenant may give a copy to a friend or a neighbor in case they lock themselves out, etc, you get the picture right?
Calling a locksmith is a good idea, but I know that it can be a little pricey! Of course, they need to pay the secretary that answers the calls, expensive office/shop rents, advertisements, vehicles, etc.
A handyman may be a good solution for this task. Not having all the expenses listed above gives me a lot more room to quote my work in a more competitive range of prices.