Effective January 1, 2026: Conexus Credit Union 2006, Cornerstone Credit Union Financial Group Limited, and Synergy Credit Union Ltd. amalgamated as Conexus Credit Union. Learn more.
Debit card
Phone: 1-800-667-7477
Visit a branch
Lock’N'Block: lock your card in a jiffy
Conexus Mastercard®
Within Canada and U.S.: 1-855-341-4643
International: 1-647-252-9564 (collect)
Cardwise: Report Lost or Stolen OR temporarily turn card off
Suspicious activity
Phone: 1-800-667-7477
Visit a branch
Lock your debit card
Block ATM transactions
Block purchases and refunds
Block international transactions
Have peace of mind knowing you have control over your debit cards 24/7
Access Lock'N'Block:
Online banking
Log in to online banking Click My Conexus > Manage Cards >Lock'N'Block
Mobile App
Log in to your mobile app and tap More > My Conexus > Manage Cards > Lock'N'Block
Cardwise :
If you have lost your card, you believe it has been stolen, or you suspect fraudulent activity on your card account, you can report the card as lost or stolen through CardWise.
Perform this function under the Manage Card section.
You can temporarily turn your card on or off. If you turn off a card, all transactions will be denied, except for any previously scheduled recurring payments/transactions.
Click ON or OFF under the card image.