Some organizations indicate that the procedures could be enhanced by the use of plastic cards or other documents for tax-free purchases at source (United States of America model) - this would streamline procedures and reduce paperwork.
有些组织指出，使用免税塑料卡或其他证明从源扣除税收(美利坚合众国模式)，可以简化手续，减少文书工作，从而提高效率。