What do I do if I cannot find Unique Account Number details? March 29, 2022 09:45 Updated If you have lost any of your security details or believe or are suspicious of fraudulent activity on your Unique Account Number, please contact us through our Help Center immediately to report this. Related articles What is a Unique Account Number and how does it differ from the existing methods? How to reset your 2-factor authentication How do I protect my Unique Account Number? What happens if I transfer to my old deposit details? What do I do if I see unauthorized activity with my Unique Account Number?