老人持十年旅游签证入境，即将满六个月，机票改签了，会比六个月多2个星期，怕影响下次入境，遂在网上申请延期。
在移民局网站找寻是否适合的时候，读到这么一句
If you Don’t have a visitor recorded or permit but received a stamp in your passport , your visitors status will expire in six months from the date your passport was stamped by the officer when you arrived
听说一般是入境可以停留半年，问题是翻遍了护照，也没有入境盖章，难道是就不需要申请延期啦？
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