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.
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Here is the honest breakdown of how to change your Santander debit or credit card PIN using online banking, mobile apps, and ATMs. how to change my santander pin number online