Help centre
Use the search bar to write keywords without giving out any of your personal information.
I’ve lost my ID. What now?
Call us immediately at 1-800-361-0070 to secure your banking file.
Are you abroad?
You can call us at 514-844-8026. We accept collect calls.
To alert us of a lost Mastercard<sup>®</sup> credit card, you can also contact Mastercard Global Service<sup>®</sup> at the local number of the country you’re visiting. Your call will be redirected to National Bank.
Don’t forget to immediately lock your debit card or credit card from your online bank or the National Bank app.
Legal disclaimers
®Mastercard and Mastercard Global Service, are registered trademarks of Mastercard International Incorporated. Authorized user: National Bank.
Related questions
-
I lost my cell phone. What now? Lost your cell phone? Follow these simple steps to secure your account and deactivate mobile payments. -
I’ve lost my debit card. What now? Was your debit card lost or stolen? Lock it online to avoid any fraudulent transactions and contact us to replace it. -
I’ve lost my ID. What now? Lost your ID? Quickly secure your banking file against identity theft by calling us at 1-800-361-0070. -
My National Bank Mastercard credit card is lost or has been stolen. What now? Has your credit card been lost or stolen? Quickly lock and replace it, here or abroad, from your online bank or the National Bank app. -
Where is the security code on my credit card? Find your 3-digit security code on the back of your credit card to confirm your online purchases.
Chat with our virtual assistant
Ask a question for immediate answers to your questions, available 24/7