To report a lost or stolen debit card, National Bank has specific procedures that customers can follow. It is essential to act quickly to limit potential unauthorized charges on the account. Customers can typically find a dedicated phone number or online reporting option on the National Bank website that enables them to report the issue promptly. The customer service representatives will assist in deactivating the lost or stolen card and may initiate a replacement card process right away. Additionally, it is advisable for customers to monitor their account statements and transactions closely for any suspicious activity after reporting the loss. Always ensure that personal information is kept secure and refrain from sharing sensitive details in unsecured environments. For the most accurate and detailed instructions, visiting the official National Bank website would be beneficial, where up-to-date contact information and guidelines are available.