I think that you would have to pass along more details of the transaction in question for anyone (even the experts here at bitcointalk, I am not an expert).  My *guess* is no.

Quizas Ud. puede preguntar con detalles y palabras EXACTAS en la parte del foro en español.  Pero, supongo que NO.

Good luck.
Suerte.

Yah that can help in case if someone wants to kick a bitcoin transaction from mempool.But if it gets even 1confirmation it cannot be cancelled.Also now most of bitcoin wallets don't allow double spend which makes it hard .Though you can still pass on a double spend transaction doing a little bit coding on core wallet.

What site did you buy from? What happened? Share your experience. Perhaps it could serve as a warning to others.

Thanks for the spanish my friend greetings from Mexico City, i know that my english is not perfect but i can read it and write it, at least for make that the other understand a little bit what i can say..    lol

Gracias por el español, saludos desde la ciudad de México.  se que mi ingles no es perfecto pero puedo leer y escribir lo bastante para entender y que otros entiendan.


Saludos.

Greetings

not yet, but is something that i want avoid.....


thanks

I read somewhere that you can:
"To send to the network transaction uses the same inputs coins to your address + add to it another 1 Bitcoin such as ++ and add more commission - its first grab any pool once - and the first transaction will be recognized as erroneous" (c)

The phrase "to cancel the transaction" is not applicable for Bitcoins and networks. On cancellation of the transaction can only speak as part of the service, ie, transaction handler.
The transaction is sent to the network scatters on clients and reach the miners. Enabling transaction block miners, will confirm.
attack scheme should be like this: we send a transaction that comes to transaction processor in payment acceptance service (a "subnet") and almost simultaneously send another transaction that uses the same input as the first miners in the nodes (the other "subnet").
As a result, the unit will be turned on the second transaction and the first ever confirmed as the inputs used in the second, but the service has reached the first.

It sounds like you are trying to find a way to send a btc transaction in exchange for something but cannot be assured of delivery. In this case you will want to use a trusted third party for escrow. Some alt coins are developing escrow built - in to the wallet, such as syscoin

unfortunately you can't take back your coins once you have sent it and get into transaction,its just like if you sent money from ATM,you can cancel it,because if this feature exist in bitcoin transaction,every people have a chance to be scammer.

Estoy de visita en el Peru por el momento.  Rodeado por mis cunados.  "Si no practico espanol en la casa, me pega la jefa!"

(Chiste!)

Visiting Peru (on business and pleasure), enjoying my very decent in-laws.

Parace que hay MUY poco de BTC aqui...

Hardly any Bitcoin activity here, but Peru is not in chaos like Brazil, Argentina and Venezuela.