What does Advance Parole mean?
I entered the U.S. on H-1B and have been working, and am now going through the employment-based process. I recently wanted to visit Korea and, while researching, found that I should get something called Advance Parole before going. I’d like to know if I absolutely need this to safely re-enter the U.S.
Advance Parole is the travel document you can apply for so that you may travel outside the U.S. while your green card is pending and be allowed to return. If you leave the U.S. without obtaining Advance Parole, you risk being denied re-entry.
However, as in your case, if you entered the U.S. on H-1B or L-1 status, you do not need Advance Parole.
If you hold valid H-1B or L-1 status (in the case of a change of status rather than an actual visa at entry), you can obtain a new H-1B or L-1 visa through the embassy and re-enter that way.
Absent unusual circumstances, the consulate will typically issue a visa reflecting your existing status, but the consular officer may deny the visa if there is a valid reason to do so.