Immigration Site

I havent seen a new thread track the I-751 application for April 2011 filer. Here we go

So here is mine:
Location: Detroit, Michigan
California Service Center

04/23/11 - Mailed I-751
04/25/11 - Application Receipt date
04/27/11 - Check cashed
04/29/11 - Received I-797 NOA and One year extension letter

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I sent mine last week; how long will it take these days? 5 months?