Core Viewpoint - The recent incident of fraudulent transactions involving the SPDB Mastercard credit card has raised significant concerns among cardholders, with many reporting their experiences on social media. The incident is suspected to be linked to organized hacking activities, prompting SPDB and Mastercard to conduct investigations and implement measures to protect customers' rights and financial interests [1]. Group 1: Incident Overview - A surge in reports of fraudulent transactions on SPDB Mastercard credit cards has been observed, indicating a potential organized hacking attack [1]. - Affected cardholders have had their accounts frozen or reported lost cards, with some bills being cleared by the bank [1]. Group 2: Response from SPDB and Mastercard - SPDB's credit card center has issued a statement ensuring that customers will not bear the losses from the fraudulent transactions and will work to protect their legal rights [1]. - Mastercard has initiated an emergency investigation in collaboration with SPDB, forming a special team to trace the source of the risk and prevent further potential losses for cardholders [1].