Chargebacks in online gambling occur when players dispute transactions to reverse payments to casinos, often due to unauthorized charges or perceived fraud. These disputes can disrupt casino finances, as casinos must provide evidence to challenge the chargeback; failure to do so results in losing the funds and potentially incurring extra fees. Excessive chargebacks can damage a casino's reputation and lead to increased scrutiny from financial institutions. Therefore, both players and casinos need to understand the implications of chargebacks in the online gambling landscape.