As an add-on to the above question, we are currently renting a unit from a rental agency. When we moved in, there was an alarm system installed, but no one knew what the codes were, or if any supplied remotes worked, and so we got the specialists in to get this sorted.
They helped set up new codes, got new remotes, and tested the alarm system, only to find the battery pack was not fully functional. We had a brand new system installed, and we asked the owner of the proprety if she would allow the upgrade, which she obviously did.
We did upgrades to the garden, fixed a few broken things in the house, and even got a router installed (also with her permission) at our expense.
The agency decided to do a random inspection last week, and now mentioned that the router installation must be fixed (I am not sure if this implies we need to remove the router, and fix any damages caused), and that we need to repaint the walls where the new alarm system units were installed, as you can now see the previous layers of paint that was behind the old panels...
Is this fair of them to ask us to not only pay for the upgrades, but now also for any "marks" left during these upgrades?