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Matchmaking company Duo fined $810,500 over data leak involving nearly 430,000 members

Published: 23 Apr. 2026, 15:25

Logo of Duo [SCREEN CAPTURE]

The data protection regulator said on Thursday that it has fined the locally leading matchmaking company Duo more than 1.2 billion won ($810,500) over a data leak involving the personal information of nearly 430,000 members.

The leaked information included members' IDs, passwords, names, birth dates and addresses, as well as their heights, weights, religion, previous marriage experience and other personal and professional signal according to the Personal Information Protection Commission.

The breach occurred in January of last year when an employee's work computer was hacked, but the company failed to notify authorities for three days without justification, the commission said.

Under the law, businesses and other entities in Korea are required to notify authorities of potential data leaks as soon as they become aware of the possibility.

The company was also found to have failed to implement data protection measures, such as by not restricting access to its database in the event of multiple failed entry attempts.

The regulator said that it imposed a penalty of 1.2 billion won on the company, as well as a fine of 13.2 million won, and ordered it to immediately notify affected members of the leak.

Additionally, it ordered the company to strengthen data protection measures, review its personal information processing methods to minimize any data collection and disclose the fine on its website.

Yonhap