回复:绿卡上的A number是2xxxxxxxx,这是个新number, 而以前收据上的是0xxxxxxxxx. 谢谢!

An A number should never be changed once you received one, just like a SSN. You need to contact USCIS customer service with the issue. They will tell you how to get it corrected. Or consult a lawyer if you have one. Good Luck!

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