To link your TSB bank account you need:
1. User ID
This is the ID you created when registering for the online banking. It is between 9 and 30 characters long and can include letters and numbers.
Your password is between 6 and 15 characters and must include both letters and numbers. It is the password you need to log in to your online banking.
3. Memorable Information
TSB asks for 3 random characters but to link your TSB bank account to Plum you need to enter ALL the characters.