Do I need to print the approved ESTA?
我需要打印经批准的ESTA吗？
Once your ESTA application has been approved, you will receive a PDFfile of your travel authorization in your email box. However, you do not need to print it out. It will be linked directly to your passport number digitally starting from the date of issue.
一旦你的ESTA申请已被批准，你将收到在你的邮箱里有一个PDF文件你的旅行授权。然而，你不需要打印出来。它将从签发日期开始，直接与您的护照号码进行数字链接。