When a container is affixed with a Singapore Customs red seal, you must submit an online application for Customs Supervision for unstuffing within one working day of the container's clearance from the checkpoint. Schedule the intended unstuffing operation for at least one working day after submitting the e-file application.

It is crucial that you do not break the red seal until you receive further instructions from Singapore Customs. Adhering to these procedures ensures compliance with Customs regulations and maintains the integrity of the sealed container.