To check if you were at public places visited by cases in the community during their infectious period1 - based on your SafeEntry records - access the SafeEntry Location Matching Self-Check service via the TraceTogether App [download link], SingPass Mobile App [download link], or at https://wereyouthere.safeentry.gov.sg.
To understand how matches are determined, visit this link.
1 Excludes residence, workplaces, healthcare facilities and public transport.