An appeal is a request for a higher court to review the rulings or decisions of a lower court for errors in law or improprieties. The appellant, through written briefs, makes legal arguments to the appellate court, and the court determines whether there was error in the trial. Typical grounds for appeal include errors in jury instructions, the improper admission of evidence against the defendant, the improper exclusion of defense evidence, and prosecutorial misconduct.
The appeal is not another trial, it is a process to review rulings by the lower court. On appeal, appellant can only raise issues which are apparent from the transcripts and records of the lower court.


A writ is an extraordinary remedy only available when a party has no other adequate remedy at law, such as an appeal. Writs are a procedure for the reviewing court to review a legal issue. Typical writs, include the writ of habeas corpus and the writ of mandamus. Writs can be used to go outside the court record and can include new evidence.