Please read through this carefully and be very cautious if you ever receive any such call/s! As long as you have the slightest of doubt, make an immediate police report! Our fellow member fell victim for a phone scam just few days ago! You can be next, be extremely cautious and skeptical!
For the record no national bodies in Singapore; ALL Ministries and Statutory Boards will ever ask for your credit card number over the phone! Any such requests over the phone, INSIST you will personally go to the said office to pay at cashier.