请问如果母亲在8月份回美证到期之前仍收不到绿卡面试通知，那她怎么回国？回美证可以延期或renew吗？
-She can apply for a new advance parole in advance up to 120 days before her current advance parole expires. She must have the new approved advance parole before she leaves. If it is urgent, she can go to the local USCIS Office to apply for the emergency advance parole.
-She can apply for a new advance parole in advance up to 120 days before her current advance parole expires. She must have the new approved advance parole before she leaves. If it is urgent, she can go to the local USCIS Office to apply for the emergency advance parole.
