Santander Lost Cards 'link' -

You should report the card as lost immediately to prevent unauthorized transactions.

To report a lost or stolen Santander card, you'll need to provide some information to their customer service team. Here's what you'll need: santander lost cards

Santander's customer service team will guide you through the process and answer any questions you may have. You should report the card as lost immediately

Visit your local Santander branch with identification. They can help you cancel the old card and order a new one. santander lost cards