I enter USA last December 2013 and until now (Feb 2014) I haven't received my green card yet. My family were planning to travel outside the US this coming March and i'm not sure if i will have the greencard on hand by that time. My question is can i re-enter US with temporary I-551 stamped on my passport?
And my another concern is if yes, I enter here with the category F2A which is unmarried child under 21, I'm currently 20 y/o right now and on march i'll be turning 21. Will there be any problem as I re-enter with my temporary I-551 with category written F2A, yet I'm already 21 by that time?