While reviewing the end of year statements I noticed the tenants haven't been charged for water usage. The RE agency now has new property manager. I brought this to new property manager's attention and he confirmed it was previous property manager who for some reason forgot to charge tenant water usage for pretty much whole year. He also said, tenants are not liable to pay any bill that's more than 90 days old. He has apologies on behalf of previous employee and says there is nothing he can do. I now have following options: - Suck it up and do nothing. - Change rental agency. - Ask agency to pay for the loss because of the negligence of their employee. I am reluctant to change agency because it's just one off case they made this mistake otherwise they are doing great. Happy with new property manager as well. Any advise?