[Bithumb] We apologize to our customers (Additional notice)

* Update date: 2026-02-07 04:30

Regarding today’s erroneous payment incident, we have confirmed the facts more clearly and are providing the following additional notice.

1. Cause

During the event reward distribution process, an input error in the Bitcoin amount resulted in Bitcoin being mistakenly credited to some customers.

The details are as follows.

- 2026-02-06 19:00: Event rewards paid to 695 customers

- 2026-02-06 19:20: Erroneous reward payment identified

- 2026-02-06 19:35: Trading/withdrawal restrictions initiated

- 2026-02-06 19:40: Trading/withdrawal restrictions completed

2. Status of recovery of erroneously credited assets

Using our internal controls system for detecting abnormal transactions, we restricted trading and withdrawals for the 695 affected customers within 35 minutes of the erroneous credit.

More than 99% of the erroneously credited amount has been recovered, and swift action helped minimize potential customer impact.

We are also proceeding with prompt recovery measures for the remaining unrecovered assets.

- Erroneously credited amount: 620,000 BTC

- Recovered: 618,212 BTC (99.7% of the total)

- Of the assets (KRW and cryptoassets) equivalent to 1,788 BTC that had already been sold, 93% has also been recovered

(We have confirmed that there were no external transfers of the erroneously credited Bitcoin.)

The number of coins held in wallets is maintained to be 100% identical to the balance displayed on customers’ screens through strict accounting controls, and we disclose this transparently through quarterly asset audits conducted with an external accounting firm.

In this incident, the BTC amount that could not be recovered and was already sold will be fully covered using company-held assets.

Bithumb takes this incident seriously and will devote all efforts to preventing a recurrence by redesigning the overall asset payment process and enhancing our internal controls system.

We will do our utmost so that users can feel secure and continue to trust Bithumb’s services.

We sincerely apologize for the inconvenience caused to our customers due to the confusion that arose during this event distribution process.

During today’s event distribution process, an abnormal amount of Bitcoin was credited to some customers.

As sales were executed from some accounts that received the Bitcoin, Bitcoin prices temporarily experienced sharp volatility.

Bithumb immediately detected abnormal transactions through our internal controls system and promptly restricted trading for the relevant accounts.

As a result, the market price returned to normal levels within 5 minutes, and the domino liquidation prevention system operated normally, meaning no cascading liquidations occurred due to the abnormal Bitcoin price.

We would like to make it clear that this matter is unrelated to any external hacking or security breach, and that there are no issues whatsoever with system security or the management of customer assets.

Customer assets continue to be managed safely as before, and trading as well as deposits and withdrawals are currently operating normally.

While we understand that no customer asset losses or damages have occurred as a result of this matter,

we will share all follow-up actions transparently and take responsibility through to the end to ensure that not a single customer is harmed.

Bithumb pledges to disclose additional facts regarding this matter transparently.

Once again, we deeply apologize for causing concern,

and we will continue to do our utmost to provide a stable and reliable trading environment.