I can understand a bit from the company's perspective but it's total crap if this was sprung without being mentioned prior to training. I doubt they'd fire you now for refusing since they've spend the money. You have to decide how it will change your working relationship with your boss if you say no, however. If you think you will be there a year, it may be worth just to sign it...what happens when you take a recurrent class next year? Are they going to have you sign another one? Caveat Emptor.