<p>The very last line of a block effectively contains:</p>

<pre><code>Reward for Solving this Block: Add 12.5BTC to Account for [Mining Pool].
</code></pre>

<p>If the miner tried to change that line to read</p>

<pre><code>Reward for Solving this Block: Add 12.5BTC to Account for [My Personal Account].
</code></pre>

<p>the altered line would change the block, which would change the hash, and their Proof of Work answer would no longer be valid.</p>

<p>So if a miner solves a block on behalf of the pool, they cannot submit that block for themselves; it will no longer be a valid solution.</p>

CC BY-SA 3.0
2017-06-16T23:25:33.010Z
This is correct in the essence, to be more specific though, the payout instruction is in the coinbase transaction.
Murch
CC BY-SA 3.0
2017-06-15T10:43:12.767Z
2017-06-15T10:43:12.767Z
abelenky
<p>If a group of people participate in a mining pool and person 1 finds a valid proof of work on their machine what prevents them from submitting this proof of work for themselves and not giving it to the pool to share between the participants?</p>

<mining-pools>
preventing fraud in a mining pool
user51676
# preventing fraud in a mining pool

(Asked by: username_0 on 2017-06-15)

If a group of people participate in a mining pool and person 1 finds a valid proof of work on their machine what prevents them from submitting this proof of work for themselves and not giving it to the pool to share between the participants?

**Tags:** mining-pools


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## 1 answers

### Answer by username_1 on 2017-06-15. Score: 4

The very last line of a block effectively contains:
Reward for Solving this Block: Add 12.5BTC to Account for [Mining Pool].

If the miner tried to change that line to read
Reward for Solving this Block: Add 12.5BTC to Account for [My Personal Account].

the altered line would change the block, which would change the hash, and their Proof of Work answer would no longer be valid.
So if a miner solves a block on behalf of the pool, they cannot submit that block for themselves; it will no longer be a valid solution.

> **Comments:**
> **username_2**: This is correct in the essence, to be more specific though, the payout instruction is in the coinbase transaction.  

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