Today i was selling some of my BTC to my friend and I we had a situation that I want some opinion on it . Now i sent him what worth of $100.20 ( at the time of transaction ) . But what he received was $99.70 ( at the time of received ) . Now my question is what value we should take here? The value at the moment i sent or the value at the moment he received ? I know that $0.50 is really nothing but me and my friend entered in to debate and I really wanted to know which value to use ! . because if a big delay happened and the price changed a lot with big a mount of money it gonna be a real problem .
Stick with the value of the amount that has been sent and don't base on the amount that he received because if he is a good friend he can understand that the deducted value is common and that is fees and it is very normal to have a cut on the amount that has been sent, If you are selling bitcoins then stick with the first value and if he didn't pay you based on the first value then get back the bitcoin.