<p>A double spend is not possible. A double spend <em>attempt</em>, yes. You might try and (accidentally or intentionally) broadcast two different transactions that spend the same bitcoins. But only one will eventually get included in a block.</p>

<p>If you say one payment has 8 confirmations, then that's the one that became final ('set in stone') and the other will never happen.</p>

CC BY-SA 3.0
2016-03-30T20:06:14.423Z
a double spent **is** possible. with altering the mainchain from some past block
amaclin
CC BY-SA 3.0
2016-03-30T20:11:14.377Z
yes, but it is highly unlikely that someone has right now the ability to mine 8 blocks before there are any new blocks.
galileopy
CC BY-SA 3.0
2016-03-31T09:48:38.633Z
@amaclin That's extremely unlikely, but even if someone pulls it off, the earlier transaction no longer exists. So eventually, that first spend never took place.
RocketNuts
CC BY-SA 3.0
2016-02-29T19:13:36.957Z
2016-02-29T19:13:36.957Z
RocketNuts
<blockquote>
  <p>The recipient says he hasn't received it.</p>
</blockquote>

<p>Show him this transaction on any blockexplorer site</p>

<p>E.g. on blockchain.info</p>

<p>See also <a href="https://bitcoin.stackexchange.com/questions/40716/conflicting-transaction-in-memory-pool">Conflicting transaction in memory pool</a></p>

CC BY-SA 3.0
2015-10-01T15:58:47.097Z
2015-10-01T15:58:47.097Z
2017-04-13T12:47:33.610Z
amaclin
<p>I made a double payment to the same address mistakenly since my internet was a bit slow, and one payment has 8 confirmations. The recipient says he hasn't received it. I got this message from the transaction: </p>

<blockquote>
  <p>A conflicting transaction has been detected in our memory pool. The transaction hash displayed below may change.</p>
</blockquote>

<p>What can I do to resolve this?</p>

CC BY-SA 3.0
2015-10-02T08:25:15.693Z
I don't think you need to do anything. Since the transactions conflict, the second one will never confirm.
David Schwartz
<transactions>
How do I resolve an accidental double spend?
roger
# How do I resolve an accidental double spend?

(Asked by: username_0 on 2015-10-01)

I made a double payment to the same address mistakenly since my internet was a bit slow, and one payment has 8 confirmations. The recipient says he hasn't received it. I got this message from the transaction:

> A conflicting transaction has been detected in our memory pool. The transaction hash displayed below may change.

What can I do to resolve this?

**Tags:** transactions

> **Comments:**
> **username_1**: I don't think you need to do anything. Since the transactions conflict, the second one will never confirm.  

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## 2 answers

### Answer by username_2 on 2016-02-29. Score: 1

A double spend is not possible. A double spend *attempt*, yes. You might try and (accidentally or intentionally) broadcast two different transactions that spend the same bitcoins. But only one will eventually get included in a block.

If you say one payment has 8 confirmations, then that's the one that became final ('set in stone') and the other will never happen.

> **Comments:**
> **username_3**: a double spent **is** possible. with altering the mainchain from some past block  
> **username_4**: yes, but it is highly unlikely that someone has right now the ability to mine 8 blocks before there are any new blocks.  
> **username_2**: @username_3 That's extremely unlikely, but even if someone pulls it off, the earlier transaction no longer exists. So eventually, that first spend never took place.  

---

### Answer by username_3 on 2015-10-01. Score: 0

> The recipient says he hasn't received it.

Show him this transaction on any blockexplorer site

E.g. on blockchain.info

See also [Conflicting transaction in memory pool](https://bitcoin.stackexchange.com/questions/40716/conflicting-transaction-in-memory-pool)


---

