When you find yourself doing surveillance on an apartment, you want to make sure it’s actually occupied before you waste a ton of time staking out a vacant unit!
If you can get access to the electric meter for the apartment, check to make sure electricity is being used in there. If you see zero activity on the meter, then you have to consider that the apartment is unoccupied.
Check to make sure you have a truly good address before proceeding.
Have a great rest of you day!