Have you ever lost your house keys and worried about a stranger getting in? Unless you're the first occupant of the property, you never can be sure how many copies of your keys are out there.

Q: I recently moved into a new house and would like to get the locks changed, as I don’t know how many people have keys to my home. Rather than pay a locksmith, I saw a do-it-yourself kit that I would ...

Living arrangements change, and sometimes we need to prevent someone who has, once had, or may have a key to our home from being able to use it again. In situations like these, we might assume that ...