• Intoxicating liquors not exceeding ten litres and tobacco not exceeding 0.4 kilogrammes in the possession or baggage of any person arriving in Singapore.
• Petroleum carried in the supply tank or in a spare container of not more than ten litres capacity of a motor vehicle or in the fuel supply tanks of an aircraft for its propulsion.
• Dutiable goods imported by post unless so required by Customs.
• Dutiable goods removed from a vessel into a Free Trade Zone by an authority administering the Free Trade Zone.

• IN-Payment declaration 
• IN-Non-Payment declaration
• OUT (with or without Certificate of Origin) declaration
• Transhipment/Movement declaration

Customs declarations are submitted for the following purposes:

• IN-Payment - for payment of duty and/or GST on goods which are to be consumed in Singapore;
• IN-Non-Payment - removal of goods from arrival points (by sea, air, road and rail) to licensed premises or other approved places of storage; to cover movement of goods which are exempted from payment of duty/GST in Singapore; to cover movement of goods which are exempted from payment of duties but are GST payable
• Transhipment/Removal - for through transhipment and removal of goods:

1. imported by sea from vessels at anchorage to the Free Trade Zone (FTZ) for storage;
2. from the FTZ for re-export to foreign destination;
3. from the point at which they arrive on import to another point at which they are to be re-exported (eg. from Peninsular Malaysia via Woodlands Checkpoint to Singapore Changi Airport);
4. to cover movement of goods between licensed or approved premises within Customs territory (eg from one licensed warehouse to another);

• OUT (with Certificate of Origin) - to cover the movement of goods from Customs territory (eg, removal of goods from licensed/approved premises for export or storage in the FTZ) together with a Certificate of Origin;
• OUT (without Certificate of Origin) - to cover movement of goods from Customs territory (eg. removal of goods from licensed/approved premises for export or storage in the FTZ);