Bitcoin User Pays Over $105,000 in BTC to Send Just $10

In a stark and costly reminder of the risks of self-custody, an unidentified Bitcoin user paid a Bitcoin transaction fee of over $105,000 to send a mere $10. The transaction, processed on November 10, 2025, has ignited a fierce debate in the crypto community, placing the spotlight not on the sender, but on the miner who received the windfall: MARA Pool.

The core of the issue now rests on whether the mining pool will follow a high-profile precedent set in 2023 and return the funds, or keep the six-figure fee as a valid—if astronomically high—payment for processing the block.

The Anatomy of a $105,000 “Fat-Finger” Error

On-chain data, first highlighted by blockchain monitoring services like Whale Alert and Mempool.space, details the staggering error. The user intended to send 0.00010036 BTC (worth approximately $10 USD at the time) to an address associated with the Kraken crypto exchange

In the process, they attached a fee of 0.99 BTC, valued at $105,197

The transaction was successfully included in a block mined by MARA Pool, the mining pool operated by Marathon Digital Holdings, a major publicly traded Bitcoin mining company.

For context, the average Bitcoin transaction fee on the same day was well under $1 for a standard, non-urgent transfer. This means the user paid a fee approximately 10,500,000% (ten million, five hundred thousand percent) higher than necessary.

Expert Analysis: How Does This Even Happen?

While shocking, such errors are not new to the crypto world. They almost always stem from a manual error when using a “hot wallet” or software that provides advanced, non-standard features.

“Some Non-Standard Way”

Most modern crypto wallets automatically calculate the optimal fee required to get a transaction confirmed in a timely manner. However, some wallets, particularly those used by exchanges, payment processors, or advanced users, allow for manual fee setting.

This feature is often used to implement “Replace-by-Fee” (RBF), a function that allows a user to “unstick” a pending transaction by re-broadcasting it with a higher fee.

Experts believe the user likely made a “fat-finger” error, confusing the “amount” field with the “fee” field, or incorrectly inputting data while crafting a manual transaction.

Nick Hansen, CEO of competitor Luxor Mining Pool, commented on the incident, telling Decrypt it was “definitely some non-standard way of crafting a transaction

Scott Norris of Omnes suggested the cause was likely “carelessness,” noting that “it’s not terribly hard” to manually customize transaction fees in certain wallets.

This incident underscores a core tenet and risk of the Bitcoin ecosystem: “Be your own bank.” With that freedom comes total responsibility. There is no “undo” button, no customer service hotline to reverse a transaction. Once confirmed on the blockchain, it is immutable. The only path to recovery is the goodwill of the recipient—in this case, the mining pool.

The Miner’s Dilemma: A $500,000 Precedent Looms

The entire crypto community is now watching MARA Pool. The central question is whether they will follow the precedent set by F2Pool in a remarkably similar—and even more expensive—incident from 2023.

The Paxos Case: A $511,000 Refund

On September 10, 2023, the blockchain infrastructure firm Paxos made a nearly identical error. The company paid a staggering 19.82 BTC in fees to move just 0.074 BTC

At the time, the fee was worth $511,512, while the transaction itself was valued at only $1,911.

That fee was collected by F2Pool, one of the world’s largest Bitcoin mining pools. After Paxos publicly claimed responsibility for the error on September 13, 2023, F2Pool faced intense public pressure. Initially, the miner announced it would “distribute” the fee to its miners as is standard practice.

However, after confirming the error with Paxos, F2Pool reversed its decision. On September 15, 2023, blockchain data confirmed that F2Pool had returned the full 19.82 BTC to Paxos

This act of goodwill was widely praised but also highlighted the lack of any formal process. Miners are under no technical or legal obligation to return transaction fees. The fee, however large, is a valid payment for the service of including the transaction in a block.

Not all such cases end so happily. In 2019, an Ethereum user accidentally paid $400,000 in fees. The mining pool in that case, Sparkpool, agreed to return only half of the lost funds

Data Context: A History of Extreme Fee Errors

The November 10 transaction is one of the largest fee overpayments in Bitcoin’s history, but it is not the largest in dollar value.

Data compiled from Cointelegraph, Investing.com, and Decrypt.

Just two months after the Paxos incident, another user paid a record 83.65 BTC (worth $3.1 million) as a fee. In that case, the mining pool AntPool froze the fee and, after verifying the sender’s identity, returned the full amount.

These precedents put significant pressure on MARA Pool to act. As a U.S.-based, publicly traded company (NASDAQ: MARA), its actions will be heavily scrutinized by both the crypto community and its own investors. Keeping the $105,000 windfall could be seen as unethical and damage its reputation, while returning it would align with the “goodwill” precedent set by its competitors.

What Happens Next?

The ball is in two courts.

1. The Sender: The anonymous user, who sent the funds to a Kraken exchange wallet, must now attempt to prove they were the owner of the sending wallet. This is a non-trivial technical challenge, typically requiring them to sign a specific message with the wallet’s private key. They must then publicly contact MARA Pool and appeal for a refund.
2. MARA Pool: The mining pool must decide its policy. Will it wait for the user to come forward? Will it follow F2Pool’s and AntPool’s lead and return the funds upon verification? Or will it remain silent and absorb the fee as legitimate, if fortunate, revenue?

As the Bitcoin network continues to mature, this $105,000 error serves as a brutal lesson in the responsibility of decentralization. While the immutability of the blockchain is its greatest strength, it is also its most unforgiving feature.