Appeal courts have the power to decide whether a lower court correctly interpreted the law and/or handed down a fair sentence.

Prosecutors may appeal an acquittal or, in the case of a conviction, ask an appeal court to increase the offender's sentence. An offender may also appeal a conviction and/or ask an appeal court to decrease their sentence.

In most cases, the appeal court studies a transcript from the trial and listens to arguments from both the prosecutor and the defence lawyer. Witnesses are rarely required to testify again.

An appeal court can: