If you check in using the SafeEntry QR webform, ensure you submit your current mobile number.
If you check in using TraceTogether QR, ensure you register your current mobile number is TraceTogether.
If you check in using SingPassMobile, a physical identity card (e.g. NRIC, Transitlink Concession card, Passion card, Pioneer Generation card, Merdeka Generation card, Driver’s License), a digital identity barcode in TraceTogether app or the QR code on the TraceTogether token, ensure your current mobile number is registered with SingPass.
If you check in using a work pass card issued by the Ministry of Manpower, ensure your current mobile number is registered with SingPass, FWMOMCare app, Employment Pass Online system or Online Foreign Worker Address (OFWAS).