Hi Wang Hao Yu! When a vehicle beats the red light, there will usually be a flash, you'll be certain to notice if you have been captured by it. You just have to wait for 5 to 7 business days to know if you will receive a notice letter. Alternatively, you may check and enquire from time to time through this link: https://eservices.police.gov.sg/content/policehubhome/homepage/enquiry/status-of-driver-improvement-points.html