Card skimming is a method criminals use to steal credit or debit card information during transactions. It involves installing unauthorised devices, known as skimmers, on ATMs or other card payment terminals. Without the cardholder's knowledge, these devices capture the card's magnetic stripe data, including account numbers and personal identification numbers (PINs). The stolen information is then used to create counterfeit cards or make unauthorised purchases, posing a significant risk to individuals' financial security. It poses a significant threat to tourists in Bali, with criminals targeting ATMs to steal card details and personal information. These devices, discreetly installed on machines, capture data when users insert their cards, leading to fraudulent transactions and compromised accounts.