I recently got approved for both my I-751 and N-400 at my combo interview. The interviewer told me it would be 4 to 6 weeks before I got a letter inviting me to the oath ceremony.
I have read elsewhere that it could take 2 months or longer to get that letter. The only letter I got since the interview was one saying my I-751 was approved and that I wouldn't be
issued a green card because my N-400 was approved as well.
I am planning to travel home next year and if I'm still awaiting an oath ceremony date, am I allowed to travel outside the country? My two-year green card has now expired (including the date on the extension letter),
so I'm guessing just travelling with the I-751 approval letter and no green card might be an issue?