Originally Posted by
AlmostThere
Had she applied for advanced parole from the US? You need this to re-enter while an AOS(Green Card) application is pending.
She was extremely lucky in getting back to US, and she is very right in not trying to leave until the stamp is received.
Yep, while the application is pending then you need advance parole to travel. My wife made many a trip using that paperwork. Once the stamp is in the passport then you technically are a resident, it may however be with restrictions. We have applied for visas with some countries and they stated they needed the actual physical green card and the I551 stamp in the passport would not be good enough.