IMHO..your friends will survive from being discharge of court case.
From my late experience, I ever get quit from my previous job with only SMS notice which break the rule of 1month notice.
My previous employer did only ask whether I confirm want to quit from their office. Other is depend on their kindness of board member that usually wont commit very indirectly with Labour Act as they had handle a lot of crucial matter such as Foreign worker etc that slightly disobey the rule.thanx