<p>From the help of the console :</p>

<blockquote>
  <p>abandontransaction "txid"</p>
</blockquote>

<p>That will tag the transaction as abandonned</p>

<pre><code> "abandoned": true
</code></pre>

<p>After that, you can reselect the input(s) to send it with higher fees</p>

<p>Tested in bitcoin core 0.12.1</p>

CC BY-SA 3.0
2017-06-02T17:17:35.113Z
does this work for non wallet id transactions in any way ?
Shabahat M. Ayubi
CC BY-SA 3.0
2017-12-11T13:45:22.317Z
@ShabahatM.Ayubi only with in-wallet transactions https://bitcoin.org/en/developer-reference#abandontransaction `The abandontransaction RPC marks an in-wallet transaction and all its in-wallet descendants as abandoned. This allows their inputs to be respent. Abandons the transaction on your node.`
0x49D1
CC BY-SA 3.0
2016-09-03T11:18:57.847Z
2016-09-03T11:24:07.193Z
2016-09-03T11:24:07.193Z
Tanguy
<p>Bitcoin-Qt doesn't support anything like that.</p>

<p>Theoretically:</p>

<p>A transaction is canceled by publishing a second transaction which double-spends some of the coins used in the first transaction (this can be a send-to-self). If the second transaction is included in a block before the first one, the first one becomes invalid and can be considered fully cancelled after the second transaction receives 6 confirmations. It's normally not easy to do this. Network nodes won't accept transactions which double-spend coins used in a transaction they already know about. However, nodes gradually forget about transactions if they don't get into blocks, so a transaction could be cancelled if it doesn't make it into a block after several days and both the sender and recipient stop rebroadcasting it.</p>

<p>Bitcoin used to have a feature called transaction replacement. A transaction could be marked as non-final, which prevented this transaction from getting into a block, but allowed the transaction to be cancelled at any time. Satoshi disabled this a while ago, though. Transactions can still be marked as non-final, but they can't be replaced.</p>

CC BY-SA 3.0
2012-08-21T21:11:55.353Z
What's the point of marking a transaction non-final, then? A lot of what's at https://en.bitcoin.it/wiki/Contracts seems to require replacing transactions which were marked non-final.
Daniel H
CC BY-SA 3.0
2012-08-21T22:20:18.857Z
@DanielH It should be possible to communicate non-final transactions privately and only broadcast the final version of the transaction. Currently, though, one of the parties can publicly broadcast a non-final transaction, and this non-final transaction can't be replaced by a later version of the transaction. This causes problems for some contracts. Nodes should probably just reject non-final transactions if they're not going to allow replacements.
theymos
CC BY-SA 3.0
2012-08-22T01:58:55.883Z
At present, for practical purposes, it's impossible to do this. In theory, miners should be happy to replace a transaction with a conflicting transaction with a higher fee. But to my knowledge, nobody implements this. The consensus seems to be that it's more valuable to the community to have unconfirmed transactions be more reliable.
David Schwartz
CC BY-SA 3.0
2013-02-06T13:28:54.873Z
If the second transaction has a higher fee, the chances of it getting accepted are high.
Jus12
CC BY-SA 3.0
2013-04-08T15:36:36.320Z
@Jus12 {{citation needed}}
o0'.
CC BY-SA 3.0
2013-04-08T23:31:30.510Z
@Lohoris If you realize that a fee is a bid for a miner to accept transactions, and as the reward keeps decreasing, it is more advantageous for miners to drop a lower fee transaction from a double spend.
Jus12
CC BY-SA 3.0
2013-04-09T08:20:22.520Z
@Jus12 it would be more advantageous, but AFAIK no miner actually does that, hence your sentence is wrong. Until you prove otherwise.
o0'.
CC BY-SA 3.0
2017-11-12T09:37:06.640Z
Do I properly understand that in case I've broadcasted the transaction of, for example, 1BTC with super low fee when the mempool is heavily loaded and my wallet, for example, has 10BTC - to cancel the first one, that is still unconfirmed, I need to send 10BTC to myself with normally high fee, so that 1BTC transaction will be out of place?
0x49D1
CC BY-SA 3.0
2012-08-21T20:05:11.757Z
2012-08-21T20:05:11.757Z
theymos
<p>If you submit a transaction to the network but it hasn't yet be confirmed by a block, is it possible to cancel this transaction?</p>

CC BY-SA 3.0
2012-09-09T18:56:46.320Z
Is it not confirming because it is an invalid transaction (double-spend) or just low priority / spammy and thus could take a day or so?
Stephen Gornick
<unconfirmed-transactions><revert-transaction>
Is it possible to cancel an unconfirmed transaction?
Steven Roose
# Is it possible to cancel an unconfirmed transaction?

(Asked by: username_0 on 2012-08-21)

If you submit a transaction to the network but it hasn't yet be confirmed by a block, is it possible to cancel this transaction?

**Tags:** unconfirmed-transactions, revert-transaction

> **Comments:**
> **username_1**: Is it not confirming because it is an invalid transaction (double-spend) or just low priority / spammy and thus could take a day or so?  

---

## 2 answers

### Answer by username_5 on 2012-08-21. Score: 13 | Accepted answer

Bitcoin-Qt doesn't support anything like that.

Theoretically:

A transaction is canceled by publishing a second transaction which double-spends some of the coins used in the first transaction (this can be a send-to-self). If the second transaction is included in a block before the first one, the first one becomes invalid and can be considered fully cancelled after the second transaction receives 6 confirmations. It's normally not easy to do this. Network nodes won't accept transactions which double-spend coins used in a transaction they already know about. However, nodes gradually forget about transactions if they don't get into blocks, so a transaction could be cancelled if it doesn't make it into a block after several days and both the sender and recipient stop rebroadcasting it.

Bitcoin used to have a feature called transaction replacement. A transaction could be marked as non-final, which prevented this transaction from getting into a block, but allowed the transaction to be cancelled at any time. Satoshi disabled this a while ago, though. Transactions can still be marked as non-final, but they can't be replaced.

> **Comments:**
> **username_6**: What's the point of marking a transaction non-final, then? A lot of what's at https://en.bitcoin.it/wiki/Contracts seems to require replacing transactions which were marked non-final.  
> **username_5**: @DanielH It should be possible to communicate non-final transactions privately and only broadcast the final version of the transaction. Currently, though, one of the parties can publicly broadcast a non-final transaction, and this non-final transaction can't be replaced by a later version of the transaction. This causes problems for some contracts. Nodes should probably just reject non-final transactions if they're not going to allow replacements.  
> **username_7**: At present, for practical purposes, it's impossible to do this. In theory, miners should be happy to replace a transaction with a conflicting transaction with a higher fee. But to my knowledge, nobody implements this. The consensus seems to be that it's more valuable to the community to have unconfirmed transactions be more reliable.  
> **username_8**: If the second transaction has a higher fee, the chances of it getting accepted are high.  
> **username_9**: @username_8 {{citation needed}}  
> **username_8**: @Lohoris If you realize that a fee is a bid for a miner to accept transactions, and as the reward keeps decreasing, it is more advantageous for miners to drop a lower fee transaction from a double spend.  
> **username_9**: @username_8 it would be more advantageous, but AFAIK no miner actually does that, hence your sentence is wrong. Until you prove otherwise.  
> **username_4**: Do I properly understand that in case I've broadcasted the transaction of, for example, 1BTC with super low fee when the mempool is heavily loaded and my wallet, for example, has 10BTC - to cancel the first one, that is still unconfirmed, I need to send 10BTC to myself with normally high fee, so that 1BTC transaction will be out of place?  

---

### Answer by username_2 on 2016-09-03. Score: 4

From the help of the console :

abandontransaction "txid"

That will tag the transaction as abandonned
 "abandoned": true

After that, you can reselect the input(s) to send it with higher fees
Tested in bitcoin core 0.12.1

> **Comments:**
> **username_3**: does this work for non wallet id transactions in any way ?  
> **username_4**: @ShabahatM.Ayubi only with in-wallet transactions https://bitcoin.org/en/developer-reference#abandontransaction `The abandontransaction RPC marks an in-wallet transaction and all its in-wallet descendants as abandoned. This allows their inputs to be respent. Abandons the transaction on your node.`  

---

