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® credit card, you can also contact Mastercard Global Service® 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.
®Mastercard and Mastercard Global Service, are registered trademarks of Mastercard International Incorporated. Authorized user: National Bank.
Chat with our virtual assistant
Ask a question for immediate answers to your questions, available 24/7