An appeal is a request for a higher court to review a lower court’s decision for error. Losing a case does not by itself establish a ground for changing the result: the question is what review is available and what legally significant mistake the record shows.

This entry explains U.S. court appeals. Federal and state courts have different rules, and civil and criminal appeals are not interchangeable.

Who Appeals, and Who Responds?

The party seeking review is the appellant. The party opposing the appeal is usually the appellee, called the respondent in some courts, including California’s state appellate courts. These labels describe the parties’ roles on appeal, not whether they originally sued or defended the case.

The U.S. Courts’ appeals guide explains an important difference:

Common Misconceptions About the Right to Appeal

Not every ruling can be appealed immediately. Check both the decision’s appealability and the party’s entitlement to appeal. An appeal as of right provides review when its legal and procedural requirements are met; it does not guarantee reversal or an oral hearing. Other review is discretionary and requires permission. For example, the U.S. Supreme Court ordinarily chooses whether to grant a petition for certiorari.

What an Appellate Court Reviews

An ordinary appeal is not a new trial. The appellate court reviews the lower-court record and legal arguments. It ordinarily does not hear new witnesses or accept new evidence to rebuild the case. Correcting or completing a record with material already before the trial court is different from introducing new proof.

Possible issues include a misapplied statute, incorrect jury instructions, an improper evidence ruling, or inadequate support for a factual finding. Identifying an error is only part of the argument: its effect on the outcome and the applicable review standard matter. In criminal matters, focus the argument on an error affecting the conviction or sentence rather than expecting a second jury to rehear the case.

California’s official appellate FAQs illustrate three common standards:

• De novo: the appellate court decides a legal issue independently, without deferring to the trial court’s legal conclusion. This still does not turn the appeal into a new evidentiary trial.
• Abuse of discretion: the question is whether a discretionary ruling went beyond the permissible range of reasonable decisions, not whether another judge might have chosen differently.
• Substantial evidence: the court checks whether the factual findings have sufficient evidentiary support, rather than choosing which side’s evidence it personally prefers.

The governing standard depends on the issue and jurisdiction. Do not assume one standard governs every question in a civil or criminal appeal.

The Appeal Process and Filing Deadlines

The basic sequence is an appealable judgment or order, a timely notice of appeal, preparation of the record, written briefs, oral argument if held, and an appellate decision. The notice starts the appeal; the brief later explains the claimed errors using legal authority and record citations. In a federal appeal as of right from a district court, Rule 3 requires filing the notice with the district clerk.

The current Federal Rules of Appellate Procedure, Rules 3–5 provide these examples:

• Federal civil: normally 30 days after entry of the judgment or order. Rule 4(a)(1)(B) provides 60 days when specified federal government parties are involved. Certain timely postjudgment motions change the starting point; extensions and reopening have specific conditions.
• Federal criminal defendant: normally 14 days after the later of entry of the judgment or order or filing of the government’s notice of appeal. Where the government is entitled to appeal, its normal period is 30 days after the later of entry or a defendant’s notice. Specified motions and other exceptions can affect timing.

These are federal examples, not nationwide state-court deadlines. For California civil appeals to the Court of Appeal, Rule 8.104(a) normally uses the earliest applicable deadline: 60 days after qualifying clerk service of notice of entry or a filed-endorsed judgment; 60 days after qualifying party service; or 180 days after entry. The rule identifies exceptions. Do not import those periods into California criminal, limited civil, or small-claims cases.

Check the actual entry and service dates, case type, court, applicable exceptions and method of calculating time before relying on any period.

What Can Happen After Review?

California’s official appellate glossary and appellate guidance explain the principal possibilities:

A remand may accompany a reversal. It is not necessarily an immediate final victory or an order for a whole new trial. An appeal can also be dismissed without a decision on its merits if procedural requirements are not met.

Civil example: Suppose a plaintiff loses a contract claim and argues that the judge used the wrong legal rule. The plaintiff becomes the appellant; the defendant responds. The appeal addresses that claimed error using the existing record. If the error justifies reversal, the court might send the case back for reconsideration under the correct rule rather than directly awarding the plaintiff money. This is an illustration, not a prediction for any case.

Criminal example: Suppose a convicted defendant argues that the sentencing judge applied the wrong legal rule. The issue is the alleged sentencing error and the available appellate remedy, rather than simply wanting a different punishment. Check the record, governing standard and criminal notice deadline. That route is different from a government effort to appeal an acquittal, which the U.S. Courts guide says is unavailable. This is a hypothetical, not a finding that any sentence is appealable or incorrect.

Why Appeals Fail, and What to Check First

Separate three questions: Can this decision be reviewed? What error can be demonstrated? What remedy could follow? A persuasive answer to one does not answer the others.

California’s appeal eligibility guide emphasizes appealable orders, strict timing, harmful error and preserving issues in the trial court. Missing the notice deadline or appealing a decision not open to immediate review can prevent consideration of the merits. An inadequate record, unsupported legal argument, or an issue not properly preserved can also undermine the appeal; the applicable rules and exceptions matter.

Use four checkpoints before treating a loss as an appeal opportunity:

1. Appealable decision: identify the actual order and reviewing court; an adverse interim ruling is not necessarily immediately reviewable.
2. Preserved issue and record: locate the ruling, relevant objection and supporting record material. A missing objection or record can matter even where the underlying complaint sounds persuasive; exceptions need separate checking.
3. Timely notice: identify the applicable entry/service trigger and exceptions for this court and case type. A briefing deadline is not a substitute for a notice deadline.
4. Review standard and consequence: connect the claimed error to the standard the court applies and the remedy sought. Disagreeing with fact findings is different from demonstrating inadequate support; reversal may lead to further proceedings rather than an immediate final win.

As preparation, collect the judgment or order, entry and service records, relevant filings and transcripts, the ruling or objection at issue, and the requested remedy. Check these against the court’s current appellate rules. In California, filing an appeal does not automatically stop enforcement; a stay may require a separate request and security.

A retrial involves renewed trial proceedings. Post-conviction relief, including habeas proceedings, is a separate route governed by its own requirements, not another name for a direct appeal. Federal Rule 22 separately regulates habeas and section 2255 proceedings and requires a certificate of appealability for specified appeals from those proceedings. Do not assume either route extends a direct-appeal deadline.

This entry provides general information, not legal advice about a particular appeal.