Lotte Card reissues 650,000 cards after data leak, protects 1.28 million customers

Lotte Card says that from the 1st of this month through the previous day, about 650,000 of the 2.97 million customers whose information was leaked applied for card reissuance, with roughly 820,000 changing their PINs and about 110,000 suspending their cards, according to ChosunBiz. Excluding duplicates, customer protection measures have been implemented for 1.28 million people, or 43% of all affected customers.

For the 280,000 people deemed at potential risk of fraudulent use, protection measures such as card reissuance, PIN changes, suspensions and cancellations have been carried out for about 190,000, or 68%. The report notes the figures were released by Lotte Card on 24 September 2025. This article presents claims drawn from ChosunBiz’s reporting of the incident.