It’s quite common for TFL to delay transactions, so a charge might appear on a different date than when you actually travelled. If you don’t recognise a charge, the best course of action is to contact TFL directly as they’ll be able to provide more details and support.
How to investigate and dispute a TFL charge:
Log in or create an account with TFL here.
Once logged in, go to ‘Add contactless payment’ and enter your Yonder card details.
You may be issued a different reference number once your card is added.
Navigate to ‘Journey & payment history (last 7 days only)’ and find the journey you want to query.
Select ‘Contact us about this journey’.
Choose ‘I think I've been charged the wrong fare’.
Add any relevant information and select ‘reply by email’ to receive updates.