In most cases, you cannot appeal a visa denial made at a U.S. embassy or consulate instead of a formal appeal, you can usually reapply for the visa, correcting any problems.

If your visa was denied for missing documents, you can submit the missing paperwork and try again.

If the denial was based on inadmissibility like a criminal record, you may need to apply for a waiver.

If your visa petition like a family or work petition was denied by USCIS, you can sometimes file an appeal or motion to reopen.