[Your Name] [Your Address] [City, State, ZIP Code] [Email Address] [Phone Number] [Date] [Card Issuer's Name] [Card Issuer's Address] [City, State, ZIP Code] Subject: Report of Lost Credit Card — Account Number XXXX-XXXX-XXXX-XXXX Dear Sir/Madam, I am writing to report the loss of my credit card issued by your esteemed organization. I am aware of the potential risks associated with the loss of a credit card, and I would like to take immediate action to safeguard my financial interests. Please find the details of the lost credit card below: Cardholder Name: [Your Name] Account Number: XXXX-XXXX-XXXX-XXXX Card Type: [Visa/MasterCard/American Express] Date of Loss: [Date of Loss] I suspect that my credit card was misplaced or lost on [mention the date or specific circumstances if known]. Despite my best efforts, I am unable to locate it and believe that it may have been stolen or permanently lost. To avoid any unauthorized use or fraudulent activities, I kindly request you to take the following actions: 1. Block and deactivate the lost credit card immediately to prevent any further transactions. 2. Initiate the necessary steps to cancel the lost credit card and issue a replacement card with a new account number. 3. Investigate any unauthorized transactions that may have occurred prior to the card's cancellation. 4. Inform me about the progress of your investigation and resolution process. 5. Advise me on any further actions or precautions I should take to protect my account from potential misuse. I am providing a list of recent transactions made on my credit card (if known) for your reference: [Transaction Details] Furthermore, I request you to please provide an official acknowledgement confirming the receipt of this notification and a reference number for future communication. I sincerely appreciate your prompt attention to this matter and your cooperation in resolving this issue promptly. Should you require any additional information, please feel free to contact me at [phone number] or email me at [email address]. I am available at your convenience to assist you with any further inquiries. Thank you for your immediate action and support in this matter. I look forward to your prompt response. Yours faithfully, [Your Name]