special pass在女佣当天离境的时候要给海关看
http://www.mom.gov.sg/passes-and-permits/work-permit-for-foreign-worker/cancel-a-work-permit
确实要寄回MOM.
Return the original pass card within 1 week of cancellation by posting it to Ministry of Manpower, 18 Havelock Road, Singapore 059764.