Reverse bitcoin transaction.

[deepaksharma]

Hlo can we cancel bitcoin transaction. Is it possible?

[RodeoX]

No. Although one could send back received funds.

Oh wait. send back or cancel? There are some ways of canceling a transaction if it has not been included in a block. This is used for "stuck" transactions. But no way to undo a Tx that has been confirmed.

[OmegaStarScream]

Hlo can we cancel bitcoin transaction. Is it possible?

It's not possible , that's the beauty of it.
You don't have to stay paranoid for 180 days , worrying about the sender charging back or not. (I'm speaking about PayPal here)

Keep in mind that making a transaction without including any fees could lead in getting the money going back to the sender after few days , so always make sure that the transaction receive at least 1 confirmation.

[cr1776]

Hlo can we cancel bitcoin transaction. Is it possible?

Do you have a transaction id?  

Has it been confirmed?  If yes, then you can't cancel it.

[xIIImaL]

Hlo can we cancel bitcoin transaction. Is it possible?

Nope you can't do that bro because If you have send once then you will get that back until that receiver sends you back.
Check with him to get the refund from him...

[calkob]

Hope it wasnt a transaction for a large amount of bitcoin that would be tragic.....

[MyBitcoinPorn]

Hlo can we cancel bitcoin transaction. Is it possible?

Track down receiver.

Break kneecaps until he gives you his passwords.

Send BTC back to yourself.

Good luck!

[helloeverybody]

This is why you should always double check the address you are sending your bitcoins to. Once sent if its the wrong address then the chances of getting them back are slim to none. If someone has received them by mistake then you could if your lucky recover them but unlikely . If its a friend of someone your doing buisness with then they should be able to send back no problem.

[TKeenan]

Hlo can we cancel bitcoin transaction. Is it possible?

Do you have a transaction id?  

Has it been confirmed?  If yes, then you can't cancel it.

This is total fiction.  Just ask Vitalik how to do it. 

[~Bitcoin~]

No bitcoin transaction is meant to be non-reversible so it can't be reversed/canceled. Checking bitcoin address carefully before sending any is the only option to not get in similar situation like this. Why you actually need to reverse transaction?