For the example I used. Not saying "per annum" after every rate can cost the bank a lot of money so I would not say they are doing it without cause.
The differance beteen saying it and not is huge. For eaxmple a $1m term depsoit for 120 days at 5% per annum pays $16,438.36 but the same without the per ammum pays $50,000.00. I would say that $33,561.64 is "just cause". Further to that think with they woudl say if it was $10m