Someone sent 0.0001 bitcoin and paid 291 bitcoin to do it. Why?
In April 2016 the network’s typical fee was about a cent. Block 409,008 contains a fee of 291.241 BTC — then $136,000, now a small fortune.
The appearance
A single output of 0.0001 BTC and a miner fee of 291.2409 BTC. The payment is dust. The fee is the entire bag. On a quiet Tuesday in 2016, with fees around 31 satoshis, this looked like a typo written in public.
Case file sealed
Investigation notes, the reconstruction, and sources sit behind this seal. Open it when you have sat with the raw transaction.
Open the case file
The investigation
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01 The inversion
Bitcoin wallets of that era often showed two numeric fields: amount to send, and fee. Swap them and you produce exactly this shape — a dust output and a monstrous remainder, which the protocol treats as a fee because fees are implicit (inputs minus outputs). There is no 'fee output' to catch the mistake.
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02 The miner offered it back
BitClub Network mined the block in Iceland and publicly said it would return the bitcoin if the sender identified themselves. Brock Pierce told CoinDesk the pool had also offered to donate a portion to Bitcoin Core development if nobody came forward. On-chain, the fee stayed with the miner.
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03 Why the protocol cannot save you
A Bitcoin node will happily relay a transaction whose fee is 99.999% of the input. Consensus does not know what you 'meant' to send. The only backstop is wallet UX — and in 2016 many wallets still let you type a fee in BTC with no sanity check against the amount.
Reconstruction
This is the textbook fee/amount inversion. The sender almost certainly intended to move ~291 BTC and pay a 0.0001 BTC fee, or omitted a change output of 291 BTC. The protocol did what it always does: whatever is not assigned to an output is a gift to whoever mines the block. BitClub asked the sender to come forward. The chain does not record whether they ever did.