If you are in the UK and need to update your card security, use the following methods: If you’ve forgotten your PIN and just need a reminder: Log in to the Santander UK Mobile Banking app . Select 'More' or the specific card account. Tap 'Cards' and then select 'View PIN' . Follow the security prompts to reveal your 4-digit code. 2. Request a Replacement PIN via Online Banking If you want a brand-new PIN issued: Log in to Santander Online Banking. Go to the 'My Details and Settings' tab. Select 'Other Services' from the left-hand menu.
Under (or debit), choose 'Request a new PIN' . how to change my santander pin number online