• * Must be endorsed 'Card only'.
  • Stamps and the GST: Unless indicated otherwise, international post charges are GST-free. A range of specially designed GST-free stamps are available for international mail. If you use a postage meter to apply postage to international mail, you are required to apply postage at 10 percent above the published rate to offset input credits you may claim. If you wish to use domestic stamps on international mail, then you are required to affix postage at 10 percent above the published rate, for GST purposes.