Reset your details
If you can't remember your Security Number, you can tap 'Forgotten details?’.
If you need a reminder of your Personal ID, go to santander.co.uk. Tap ‘Log on’. Then tap ‘Forgotten details’ followed by ‘Forgotten my Personal ID’. Then, you'll need to enter some details to get a reminder of your Personal ID.
Then, tap 'Reset Security Number'.
You can reset your Security Number in the app after completing some security checks.
Once you have checked your details and everything is correct, tap on 'Confirm details and continue'. If you need to update your details, tap on 'Update your details?'.
You'll be asked to confirm your identity using your passport or another form of photo ID. You can tap ‘Next’ to do this. If you’re unable to do this, you can tap 'Remind me later’ and we’ll ask you to do this another time.
If you choose not to use your ID now, we’ll remind you about this later. You can tap ‘Confirm my identity’ to do an ID check, or ‘Remind me later’ to authenticate you in a different way.
We’ll send you an SMS with a One Time Passcode (OTP). You’ll need to enter this to continue.
If you’re having trouble getting an OTP, make sure your phone has signal. We can only guarantee delivery to customers who are in the UK with a UK registered number (+44).
Once you’ve completed security checks, you'll need to set a new Security Number. Please keep this safe. You’ll use your new Security Number to log on and authorise payments.
The new Security Number will replace the previous ones you may have used.
Once you’ve confirmed your Security Number, you’ll be taken to the mobile app homepage.