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1，I797是批准信，I-797C是处理地区转移和申请费收到确认，然后这么多年一直没有联络我们了，正常吗？

-Normally, yes. But if your priority date is current (either based on B Form), NVC will contact you.

2，另外，我搬家后，上网站找不到更新地址的网页，我注册了账户，账户里没有这个服务

-You need to update your address, otherwse you may not receive the correspondences from USCIS or NVC. You had better call USCIS whether they have forwarded your case to NVC. If yes, you need to contact NVC to update your address also.

Here is hto update your address with USCIS (cited at: How to Report a Change of Address to USCIS - U.S. Immigration (boundless.com):

U.S. Citizens

There are 3 ways for U.S. citizens to let USCIS know about a change of address:

1. Online, through the USCIS Change of Address page: The simplest way to change the address on file with USCIS is to use the online Change of Address form available online. It takes about 5 minutes to complete, and you can request immediate email confirmation. You should receive mail confirmation of your address change within about 15 days.
2. By Phone: U.S. citizens can let USCIS know about a change in address by calling them at 1-800-375-5283. (Non-citizens are still required to file form AR-11 or an online notification, even if they’ve told USCIS by phone about an address change).
3. By Mail: You can register a change in address by submitting Form I-865 (“Sponsor’s Notice of Change of Address”) to report any address changes. Each sponsor is required to submit this form even if they live at the same address.

3，Petitioner怎么好像是我的绿卡号码？我申请的时候已经是公民了