Possibly paying for utilities for both duplex tenants
My sister lived in a duplex for a year. Her lease is up the end of this month. She moved to a new apartment in December. Her landlord would not let her out of the last month of the lease so she just paid him for the month, and stops to check on the place once in awhile. The tenant upstairs is the landlord's daughter. He only owns this one property and rents out the downstairs to pay for the entire house (his daughter does not work) There are two electric meters and she thought there were two gas lines as there are two furnances in the basement. When she moved out she shut off her furnance completely and obviously turned off the cable and electricity.
She just received her gas bill for part of the month of december ( since December 15th) and part of january (to january 14th. Now she moved out of this apartment December 17 so she was only there (with the furnance on for three days. Her gas bill (supposedly for her 700 sq ft of the duplex) was almost $300. She looked back through the history of her gas bills and she had one almost as high last March (it was very cold but she was living in the apartment at the time, using the furnance and hot water) This is an actual reading. She now believes that there is only one gas meter and SHE is paying for both furnances. So the upstairs tenant gets free gas and my sister may be paying for everything. This is the only way she can explain the bill as she only used gas for three days of the entire month and it wouldn't cost $300 for that limited usage.
Is it even legal to rent a duplex and have one tenant (unknowingly) pay for all of a utility usage?