<prompt> Human: Ive lived at this place for 2.5 years. Im the perfect tenant, never a late payment and keep the house in good condition. The landlord is very hands off. I hardly ever hear from him and when I rarely have a problem it takes him a while to respond and sometimes he doesnt at all.I think our lease expired after a year so I dont know what we have in terms of formal written agreement right now. Just month to month I guess?Anyway, last month he informs me via email Youre rent is being lowered from 1175 to 1050 and you will now be responsible for the water bill I said Okay thats fine. So beginning of this month I send the check for 1050 and now Im hearing from him that my rent is actually 1150 and hes demanding I send him 100 more dollars. I have the email where he said my rent is 1050. Im obviously right and I guess it was just a typo on his part. I dont want to be a dick but at the same time he obviously messed up and that is not my fault.How do I respond?  <response>: The laws vary drastically depending on where you live, so for the best help you will want to include that information. 