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Online Banking

What is a Temporary Security Number and when do I use it?

A Temporary Security Number is a code we use as an additional security measure to confirm your identity if:


  • you're registering for Online Banking for the first time


  • you've forgotten your login details


  • you're using a browser on a computer or mobile device we don't recognise and we don't have your up to date mobile phone number.


We'll send the Temporary Security Number to you by text message, if we have your up to date mobile phone number. If we don't, we'll send it by post and you'll have to wait for it to arrive before you can log in to Online Banking.


When you receive your Temporary Security Number return to the Registration or Login screen. You'll be asked to enter the Temporary Security Number in full to complete registration or reset your login details.


Your Temporary Security Number is valid for 30 days from the date it was requested and can only be used once. If it expires, you'll need to contact us to get a new one.


Perfect Thankyou I will give the number a call



I have received my temporary security number, but I can't use it as i haven't received my account details. Should I have received these? I'm worried my security number will expire.



Hi @nataliemdeans, we've responded to you privately :-)

Hi how do I get a temporary security code

@Burner171 If you privately message @Tesco-Bank with your full name, DOB and postcode, we can send this in the post to you. Alternatively, you can call our Online Helpdesk anytime on 0345 300 3511 and request a TSN to be sent by text immediately once security is completed – Joe

Hi can you please send me the temporary log in code as it is saying it does not recognise my device thank you.

Hi @mulla, if you follow the instructions above we can arrange this for you - Ross

Please send me a temporary passcode I’m lock out.

Hi @oatesandy, thanks for getting in touch. If you'd like us to arrange for a TSN to be posted to you, please send a private message to @Tesco-Bank with your full name, DOB and postcode so we can look into this - Kerry 


I cant log in in my account 

 can you please send me a temporary security code as I cannot log into my loan account,  saying it doesn't recognise device.