In Reply to: You don't have to but I always do as posted by RingoUK on Tuesday, 22. December 2009 at 22:26 Bali Time:
I always pay for the VOA with a $A50 note and use the change given in Rupiah to pay for the taxi to my hotel.
Next day, I change $A at the Kodak moneychangers in Kuta for a better rate than offered at the Airport.