Where the appeal goes
Most decisions of an immigration judge in removal proceedings can be appealed to the Board of Immigration Appeals, which reviews the record rather than holding a new hearing. The notice of appeal is filed on the Board's form and has to state the reasons for the appeal with some specificity, not just a general disagreement. A timely appeal of a removal order generally keeps the order from becoming final while the appeal is pending. Reserving appeal at the hearing does not file anything; the notice still has to reach the Board in time. Waiving appeal at the hearing, on the other hand, usually closes that option.
Building the appeal
The Board looks for legal errors and for factual findings that are clearly wrong on the record, and it generally does not take new evidence. That is why the hearing transcript, the exhibits, and the judge's decision are the core materials. Bring everything from the hearing, including any written decision and the names of witnesses who testified. If the problem is evidence that was never presented, a motion to reopen may be needed instead of, or alongside, the appeal. A brief is usually due on a schedule the Board sets once the transcript is ready, and missing it can lead to dismissal.
Beyond the Board
When we first review the case, we read the decision, identify the issues worth raising, and talk through what each one would require. If the Board later rules against you, review may be available by petition in a federal court of appeals, which has its own short deadline and does not automatically pause removal. Some issues, such as certain discretionary decisions, are limited in what federal courts can review. If you are detained, the appeal and any custody questions run on separate tracks, and both need attention at the same time. You should know the appeal deadline, the core arguments, and the possible next stage before the notice is filed.