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Credit cards help and support

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Find answers to common credit cards questions here, along with guides and other useful information.

If you can't find the answer to your query, just give us a call. The best telephone numbers to contact us on for credit card queries are below.

Frequently asked questions

  • To report a lost or stolen credit card or if you believe you’ve been a victim of credit card fraud please call 0800 9 123 123 (+44 1512 648 725 from abroad). Lines are open 24 hours a day, 7 days a week.

  • You can activate your credit card online by logging on to Online Banking or by calling 0800 783 7830. Lines are open 9am to 8pm Monday to Thursday, 9am to 7pm Friday and 9am to 5pm Saturday.


    Additional cardholders should call on the number above to activate their card.

  • You can view your balance and credit limit online by logging on to Online Banking.


    You can also get this information by calling 0800 9 123 123.


    To request a change to your credit limit on your account call 0800 9 123 123. Lines are open 7am to 11pm Monday to Sunday.

  • The easiest way to change your address and contact details (including your telephone number and email address) is to do it via Online Banking. It will be changed instantly.

    If you have a joint account you can only change your own name and/or address within Online Banking. If both names and/or addresses need to be changed, both account holders must log on to their own Online Banking and change their own details.

    You can also change it by telephone or in branch.

    1. Online Banking (instant):

      Log on and update your details instantly from within the "My Details & Settings" tab.

      • Choose 'Change personal details' from the left hand menu and then click 'Change address'.

      • Enter your new details (including postcode) and follow the onscreen instructions.

      • Please note: You will need to enter a One Time Passcode (OTP) to complete this change, so make sure you have your mobile phone to hand.

    2. By telephone (for current account and savings customers):

      • Call our Telephone Banking line on 0800 9 123 123. Lines open 7am to 11pm Monday to Saturday and 8am to 10pm Sundays.

    3. In branch:

      • Complete a change of details form by

        • Printing off and completing the Change of details form (pdf) *

        • Requesting a copy of the form by calling us on 0800 9 123 123. Lines open 7am-11pm Monday to Saturday and 8am-10pm on Sundays.

        • Collect a form from your local branch.

      • Take the form to your local branch together with relevant account documentation:

        • Your cash card, passbook or certificate and;

        • Signature bearing identification such as a full UK driving licence or valid EEA passport (this includes UK passport).

    If you would like to discuss our identification requirements please call us on 0800 9 123 123 and we will be happy to help. Lines open 7am to 11pm Monday to Saturday and 8am to 10pm Sundays.

    Important information for customers with alerts: If you have Account alerts set up on your account and you want these to be sent to your updated telephone number and/or email address, then you will need to amend your alerts via the 'Account Services' tab in Online Banking as they are not automatically updated when you change your details.

    * To open these documents you will need to have Adobe Reader. If you don't already have Adobe Reader you can download it for free

  • Can't find what you are looking for? Find more on the credit cards FAQs page.

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Santander UK plc. Registered Office: 2 Triton Square, Regent's Place, London, NW1 3AN, United Kingdom. Registered Number 2294747. Registered in England and Wales. Telephone 0800 389 7000. Calls may be recorded or monitored. Authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority. Our Financial Services Register number is 106054. You can check this on the Financial Services Register by visiting the FCA’s website or by contacting the FCA on 0800 111 6768. Santander and the flame logo are registered trademarks.