In Singapore if they do take action just offer 100 dollars a month or if you want just FKOF and watch, it generally aint worth the hassle.
In Malaysia forget it I know so many cases which various companies lost due to unrealistic sum to ask to pay back plus they didnt follow employment regs anyhow. I know at least one Gent who ran during line trg at my present company who still never heard anything after more than 2 YEARS. One of my ex colleugues in FY did 24 hr notice, yes they tried to sue but yet lost due to unrealistic amount. Usually its Big talk
Not my intention to say what to do simply my experiences