It has been said sometimes that a Bitcoin transaction can be cancelled or reversed using for example double-spend.
Is it still possible? If Yes, how? If No, Why?
Especially when you sell services and goods and accept Bitcoin payment, you are worried about this.
So it should be a good idea to discuss this topic.
You know there was a time I actually have it a thought. It's on the blockchain for all to see and once the transaction goes, there are lots of things involved. For example the miners, once you send a transaction, the miners nodes pick it up and it's lined to its receiver. If you want to cancelled , does that mean the miners would refund you? So many things to think about all made me to believe it's impossible. So whichever errors you made in your transaction, don't make in next one.