<p>If there are three addressess <code>A</code>, <code>B</code> and <code>C</code> and someone sends a transaction <code>tx1</code> from <code>A</code> -&gt; <code>B</code> and another one <code>tx2</code> from <code>B</code> -&gt; <code>C</code> that spends the exact same coins (tx2 input is tx1 output) then <code>tx2</code> cannot be confirmed until <code>tx1</code> is confirmed.</p>
<p>Yes someone could trick you to accept an unconfirmed transaction as final and then send the same coins elsewhere (with a higher fee). That’s why you should not consider transactions final unless they are confirmed with at least a few confirmations (6 used to berecommended)</p>

CC BY-SA 4.0
2021-05-20T13:18:38.580Z
2021-05-20T13:18:38.580Z
Mike D
<p>Reason - Due to unconfirmed inputs.</p>
<p>Can someone please explain what this means and could the sender do this intentionally. In other words to scam someone.</p>

<unconfirmed-transactions>
Unconfirmed btc transactions
Shelley-Ann Janse van Rensburg
# Unconfirmed btc transactions

(Asked by: username_0 on 2021-05-20)

Reason - Due to unconfirmed inputs.

Can someone please explain what this means and could the sender do this intentionally. In other words to scam someone.

**Tags:** unconfirmed-transactions


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## 1 answers

### Answer by username_1 on 2021-05-20. Score: 3

If there are three addressess `A`, `B` and `C` and someone sends a transaction `tx1` from `A` -> `B` and another one `tx2` from `B` -> `C` that spends the exact same coins (tx2 input is tx1 output) then `tx2` cannot be confirmed until `tx1` is confirmed.

Yes someone could trick you to accept an unconfirmed transaction as final and then send the same coins elsewhere (with a higher fee). That’s why you should not consider transactions final unless they are confirmed with at least a few confirmations (6 used to berecommended)


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