Proceed to the Green Channel if you are not carrying any declarable goods stated above. ICA officers will conduct selective checks at the Green Channel.
If in doubt, always ask the checking officers at the Red Channel/Customs Examination Area or approach the Singapore Customs Tax Payment Office.
It is the responsibility of travellers to make an accurate and complete declaration of all goods exceeding their duty-free concession and GST relief in their possession, including goods carried for or on behalf of other persons.
Those who fail to do so can be fined and prosecuted in court. More information on customs offences is available here.