<prompt> Human: I pay 1,700 a month in rent. I have a good job and enough cash to pay rent for the rest of the year. I have never been late with our rent. One month, I even thought my check wouldnt be delivered by the first of the month, so I paid 20 to have it overnighted. My landlord said as long as I have it in the mail by the last day of the previous month, it would be fine. I mailed my check on March 31st, and my landlord called me on the 6th to say it had not arrived. We discussed that it had probably been lost in the mail, and we agreed that I would stop payment on that check, and send a new one. Landlord said they would not charge us the late fee since we were always on time previously. I put a new check in the mail the next day on the 7th and called the landlord to let them know. I started calling my landlord on the 11th to see if my check had arrived and did not receive a response until the 13th. They said my check had arrived. The next day on the 14th, my landlord calls and says my check had bounced due to insufficient funds. This is not possible as I have 2,500 in the account. It turns out my first check that I had stopped payment on had finally arrived and she tried to cash it. She was initially very mad and said she would be charging me the late fee and her banking charges. I explained that it was the wrong check and offered to drive a new check to her office immediately. She said to wait until Monday the 18th and she would call me back. The late fee in our lease is 102 per day the rent is late. Im currently waiting for a call back to solve the matter. My question is how much she could potentially ask for in late fees? I would have driven out the new check to her on the 6th if Id known we were racking up late fees. I also offered to drive out a new check on the 14th. I have asked her to save all of my envelopes so I can find out from the post office why it is taking 2 weeks for my letters to be delivered.  <response>: My question is how much she could potentially ask for in late fees?Late fee structure should be explained in your lease. 