Attorney Hanbyol Law LLC filed a lawsuit for damages against Samsung Securities on behalf of Plaintiff A, whose stock price plummeted due to a dividend calculation error, and claimed damages of approximately 60 million won. Attorney Hanbyol claimed that the company's internal control and risk management negligence caused the stock price to plummet due to the error in dividend calculation, which resulted in a large-scale selling pressure and the sale of approximately 2.8 billion non-existent shares.

The trial court accepted Hanbyol's argument and found Samsung Securities liable, citing the company's lack of internal control, breach of duty of care in electronic financial transactions, and lack of risk management. The appeals court determined the liability ratio to be 50% and ordered Samsung Securities to pay the plaintiff approximately 28 million won, and Hanbyol won partial victory by proving that the plaintiff's damages were direct damages caused by the dividend accident.