Citi United Kingdom
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Welcome to the Security Centre

Citi has a range of security measures to protect and reassure you.

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Citi Security SMS

We will alert you by SMS if we identify suspicious activity on your debit card purchases. This enables you to reply instantly to 65151 (or +447860065151 if a non-UK mobile number) and confirm whether the purchase is genuine or fraudulent, 24/7. If you reply recognising the activity we messaged you about then you can continue to use your card as normal. If you don’t recognise the suspicious activity then we will take immediate action to secure your debit card.

We’ll only ever ask you to reply to an SMS that has been sent from either 65151 or +447860065151.

This SMS alert will be free when you receive and reply from a UK number only, wherever you are. When replying from a non-UK number you will be charged according to your mobile phone’s network provider.

As a Citi client you'll automatically benefit from this service just make sure we have your up to date mobile number. You can do this by calling Citiphone on:

Citi clients – 0800 00 55 00; +44 2075 00 55 00 (if calling from abroad).
Citigold clients – 0800 00 56 00; +44 2075 00 56 00 (if calling from abroad).

Please note this service will not be applicable for mobile numbers which belong to US, France, Italy and India.

How Citi protects you

We help protect your accounts from the time you apply

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How to protect yourself

Learn how to safeguard your computer, avoid e-mail and mobile fraud, and much more

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Webroot SecureAnywhere Identity Shield

To ensure your information is kept as secure as possible online, we’re pleased to announce that Citi customers can now download the PC security software Webroot

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What should I do if my card has been lost or stolen?

Contact CitiPhone on 0800 00 55 00 (or +44 20 7500 55 00 if calling from abroad). If you are a Citigold client phone us on 0800 00 56 00 (or +44 20  7500 56 00 if calling from abroad).

What should I do if I suspect someone is attempting to commit fraud?

Contact CitiPhone on 0808 109 8888 (UK) or +44 (0) 20 7500 1445 (International)

Further reading:

Online: For more information about how to stay safe online, Get Safe Online is the UK’s leading source of unbiased, factual and easy-to-understand information on online safety:

Banking: For more information about banking and security, review this link brought to you by the UK banking industry:

Identity Theft: For information about protecting your identity, visit the identity theft website:

Action Fraud: To learn more about fraud and financially motivated internet crime, visit Action Fraud UK:

Important Information

If you are outside the UK you must ensure local law permits you to use Citi Online. Citi Online uses powerful encryption which is prohibited in certain countries.

Transfers have no transaction fee. If the transfer is made across currencies, Citi's reference exchange rate will apply. Also, transactions can only be made to selected Citi branches.

Some transactions may be unavailable during system updates