A keysafe is a coded box outside your door that someone close to you has the code, it has been spoken of here before and one aber said she could use it by keying in any number on her elderly relatives safe, that can happen if the number lock is not coded correctly, I have one and it is a tight as tuppence and very secure, the GP, my public health nurse and a member of my family have the code, once open, there is a key to the front door inside it
On the suggestion of mamya to open the front door to save it being broken down when she has indigestion, I've had a heart attack and no time for opening doors, didn't know what hit me, my sister in her early 60's has had a stroke and heart attack and lives alone a good bit away from me, only her dog for company she got through it and finally made it to hospital, thankfully no lasting damage there. It is a reasonable concern and worry though.