To ensure effective and prompt postal service, senders must ensure that their mail items have sufficient postage affixed. Any mail item with insufficient postage will not be delivered to the Digital Policy Office and will be handled by Hongkong Post according to the Post Office Ordinance.
(Note: For calculating postage, please refer to the Hongkong Post webpage on the postage calculator http://www.hongkongpost.hk/en/postage_calculator/)