You must make sure that all your witnesses turn up for the criminal trial. If you are not sure whether the witnesses are willing to turn up, you should apply at the Central Registry (State Courts Towers Level 2) for a “Summons to a Witness” to be issued against that witness. A fee of $20 is payable for every Summons issued. A Court process server will then help you to serve the document on the witness.

For more information, you may wish to visit https://www.judiciary.gov.sg/criminal/charged-with-crime and download the Guidebook for Accused in Person (available in 4 languages) found at the bottom of the page.