Dear [Client’s Name], I hope this letter finds you in good health and high spirits. Firstly, let me apologize for the inconvenience caused to you due to the recent fraudulent charges made on your account. We understand the distress and frustration such incidents can cause, and we truly empathize with you. We have thoroughly investigated the matter and ascertained that unauthorized charges amounting to [insert specific amount] were made on [insert date or date range] using your account details. Rest assured, we take such cases very seriously and have undertaken immediate actions to rectify the situation. To process your complaint efficiently, we require your cooperation in providing us with the necessary information. Kindly fill out the enclosed fraud dispute form and include any supporting documents or evidence you might have, such as receipts or statements showing the unauthorized transactions. This will enable us to expedite our investigation and, if necessary, take appropriate legal actions against the culprits. In the meantime, we have temporarily blocked your account to prevent any further unauthorized activity. You will receive a new account number and updated login credentials within the next [number of days] via secure mail. We apologize again for any inconvenience this may cause and appreciate your understanding as we prioritize the security of your financial assets. Our dedicated fraud investigation team is diligently working to identify the source of the fraudulent charges and bring the responsible party to justice. We have also alerted the relevant authorities, including the [name of local law enforcement agency], and are collaborating closely with them to swiftly resolve this matter. Please be assured that you will not be held responsible for any unauthorized charges made on your account. Once our investigation is complete, we will issue a full refund for the fraudulent transactions and any associated fees or charges that may have accrued. If you have any questions or require further assistance, please do not hesitate to contact our customer support team at [customer support contact details]. We are available [mention operating hours] and will be more than happy to address any concerns you may have. Once again, we apologize for the inconvenience caused and the impact this incident has had on you. We appreciate your patience and cooperation as we work towards resolving this matter swiftly and transparently. Your trust and satisfaction are of utmost importance to us, and we remain committed to providing you with the highest quality of service. Thank you for your understanding and cooperation. Sincerely, [Your Name] [Your Title] [Company/Organization Name]