This is kind of a long story, so bear with me, and read through it, as it is kind of intersting. A mowing customer of mine, probably for the last 4 or 5 years mailed payment for her May invoice. Through some sort of mistake, this check got lost in the shuffle that is my recordkeeping, got stamped and deposited, but never recored as being recieved. The only thing I can think of is that it got mixed in with some other checks and basically was just over looked. The amazing thing is that I am the only one that handles my invoices / customer payments ect, and I honestly don't even remember ever seeing this check. So, when the June invoices went out, she had a past due amount. She calls and says she mailed check number whatever on such and such date. I polietly explained that I had not seen it, and that perhapps it got lost in the mail. She says she is going out of town, and that if the check still does not come when she returns, she will stop payment on that check and write a new one. I said that would be fine. Remeber that at this point, I really didn't think I had ever gotten payment. I was not worried, as she was a long time customer and had never had any problems payment wise. Well, when she went to the bank to stop payment of the check in question, it came up as being deposited, with my "for deposit only and my business name" stamp on the back. The teller gave her a print out of the check. The customer then showed me this print out copy of the check. My jaw nearly hit the ground. I apologized profussly and explined to her how it must of got mixed in with some other checks and got put into the pile to be deposited but never got recored. I also offerd to credit her one free mowing as a way to make up for the mix up. Now keep in mind that she is an older lady and to her, this looked as if I was trying to take advantage of her, and there wasn't much I could say to convice her otherwise. Well, this ordeal had her so upset, that she decided to not pay the June invoice. So, once again when the last set of bills went out she once again had a past due balance. She calls up, furrious, I polietly explain that the last payment recieved was the check in that had been misplaced (I did credit the account for that amount) and that the balance on the invocie was indeed correct. She then very angerly tells me that we were mowing way to often for the dry conditions (three times in July). In an effort to keep her happy I offer to deduct one of the mowings in July. She mumbles something about that sounding better and hangs up. She finally calls up and leaves a nasty message cancelling service saying how "she will no longer put up with this dishonesty, blah blah." Now the thing the bothers me is that she honestly thinks that I was trying to take advantage of her. Now I admit that I did make a mistake, but thats exactly what it was a mistake. Ever since, whenever customers' checks come in, I take extreme caution to make sure that they are recored. So, my questions, has anyone else eve had this happen, if so how did it work out? How did I handle this situation, should I have done some other type of "damage controll." And, as a customer if someone that you had done business with for 4 or 5 years misplaced your payment, how would you react?