Sign In
Sign In

Service Disruption: A Canada Post nation-wide strike is in effect and will impact the delivery of paper statements, cards, and other documents. 
Minimize disruption to your services and ensure you are able to easily access what you need by visiting our Member News page.

Report a Lost or Stolen Card

Member Card® Debit Card

To report a lost or stolen Member Card® debit card, please call: 1.855.875.2255 during business hours. 


Outside regular credit union hours please call:
Toll free within North America: 1.888.277.1043
Outside North America: 1.905.305.4099 

Cornerstone Collabria Mastercard® 

Cardholder support team members work on your behalf 24/7 every day of the year.

To report a lost or stolen Cornerstone Collabria Mastercard®, please call: 1.855.341.4643

This website uses cookies to improve your experience on our website. By continuing to browse the site you are agreeing to our use of cookies.