hi folks, After sending our AOS papers exactly a week ago, which is today, I got text message with receipt #, and it says Official Receipt Notice (I-797) to follow in mail. so, what do we do with that number? what comes next? from what I searched there are I-797 and I-797C and E, I am still confused what they are.. I figured they are notifications for different stages of the process...? and why does it have limited time on it? the only thing I am happy about is that they didn't return all of our papers right away - I guess we had all they needed.. at least for now.