Who produces and disseminates credit card statement and investigate all amounts disputed by the card holder?

Credit card statements are produced and disseminated by the card issuer, typically a bank or financial institution, which manages the credit card account. When a cardholder disputes a charge, the issuer is responsible for investigating the disputed amount, which may involve reviewing transaction details, contacting the merchant, and ensuring compliance with relevant regulations. The issuer communicates the findings to the cardholder, providing updates throughout the dispute resolution process.