Santander A/C ending 9897: We need some important information from you. In order for us to meet UK legal and regulatory obligations, we need to make sure the information that we hold on you is up-to-date. The fastest way to update your details is to call us on 0800 085 1379 and we'll explain how you can provide the information to us. If we haven't heard from you by 23/11/2025, we'll unfortunately have to restrict access to your account(s). This means you won't be able to access money or make regular or one-off payments from your account(s). This could include mortgage payments or other standing orders and Direct Debits.