Actually I never received it, but I once accidentally put the wrong amount of bitcoin when I topping up my prepaid mobile phone. I put 0.015 which the right amount was 0.0015. Fortunately, the customer service of the site was very helpful and refunded my money. Then I realized how bad the person feel if they send their money into wrong address or with wrong amount.
I experienced it on a pay day on signature campaign I thought that the amount given to me is doubled or wrong. So I don't think of other reason of a big payment because on that day my salary should 0.0075 only but I accepted 0.0175 then I thought It is just a mistake but then I realized the every end of the month there is a bonus which was actually happened that day. So when I get to know that I become positive to do more on posting because there is always a bonus every end of a month.