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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.

Version History
Revision #
4 of 5
Last update:
‎28-04-2015 11:47 AM
Updated by:

Can you please send a TSN to my U.K. address that you have on file. How long will this take? 

Yeah, we could do this! It would take 3 - 5 working days to arrive at the address.

If you'd like us to arrange this, please follow the steps listed here.


Is there a number I can call from abroad to sort out this TSN as I’m pretty sure I will be overdue payments by now and I want to get this s

orted ASAP 

Hi @Royc, when calling from abroad you can reach us on +44141 278 7386 (24/7). However, are you also aware that you can pay your credit card from your own bank account? Use the sort code 406415 and account number 31310006 along with your full credit card number as a reference - Ross


Thank you @RossM at least I can make a payment now while I get other stuff sorted. 




how can I get my temp number? I have new phone, new comp and need to make a payment

Hi @agata22, sorry that you're having trouble. We can send you a Temporary Security Number (TSN) through the post which will reset your online banking and allow you to get logged in again. This can take between 3-5 business days to arrive and will be valid for 30 days – if you would like me to arrange this for you, please message us @CET and confirm your DOB and postcode.
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.


For details like your DOB and postcode we ask for you to format it with additional spaces, i.e. A B 1 2 C D and 2 4 1 0 2 0 1 6, otherwise the information is removed by the system.


Need a temporary security number please

Hi @Iestynpynn, please follow the instructions that my collegaue @JOEL gave above and we'll be able to help :) 


please can I get a Temp security number, this is driving me insane, no one to speak to, I don't have Facebook & Twitter, entered my postcode in twice erronoeusly and now I'm locked out...Many thanks