<prompt> Human: Im sure this is common sense to almost everyone, but being that i tend to be a trusting person this obvious piece of advice alluded me. For 6 months i have allowed my landlord to leave a voicemail with how much money i need to add to my rent check to cover my part of the gas bill. after some abnormally high bills, i asked for a copy. he replied with written amounts from last year. not good enough. i insisted and once i received the bill, he admitted that he adds on 10 each month for service fees. this was never mentioned by him or the lease, and the rental company had no idea he was doing this. Now i have to go back through six month of charges and figure out what i overpaid so i can get reimbursed. lesson learned.  <response>: Thank you for making me feel like a good landlord. I always send a copy of the bill I share with my tenant. People like this are why we have renter protection laws. 