How to Shepardize a Case and Confirm It Is Still Good Law

How do you shepardize a case? To shepardize a case is to check its later history and treatment to confirm it is still good law. You pull the case, review every later decision that cited it, and look for treatment signals that show whether the case was followed, questioned, limited, reversed, or overruled. If a controlling court has overruled or reversed it, the case is no longer good law and you should not rely on it.

The term comes from Shepard's Citations, the printed citation service that lawyers once used to trace a case's history by hand. Today the verb "to shepardize" simply means to verify that a precedent still stands, whatever tool you use, and the mechanics of running that check are covered step by step in how to Shepardize a case. It is the last and most important step of legal research, because a perfect opinion that has been overruled will sink your argument.

What "good law" means

A case is good law when the legal rule it announced is still valid and binding in your jurisdiction. A case stops being good law when a higher court or the same court rejects its rule. Watch for these outcomes:

• Overruled. A later court with authority rejects the rule of the case. The precedent is dead. Brown v. Board of Education, 347 U.S. 483 (1954) overruled Plessy v. Ferguson, 163 U.S. 537 (1896).
• Reversed or vacated. A higher court undid the decision on appeal in the same matter. The lower opinion no longer controls.
• Abrogated by statute. A legislature changed the law, so the case no longer reflects the rule even though no court overruled it.
• Limited or distinguished. The case still stands but later courts narrowed when it applies. It may not reach your facts.
• Questioned or criticized. Later courts cast doubt on the reasoning. The case may be vulnerable; cite it with care.

How to read treatment signals

Citation services attach a signal to each case so you can triage at a glance. The exact icons differ by platform, but the categories map to a simple color logic.

A warning signal does not always kill a case. A decision can be overruled "in part" or only on a point unrelated to yours. That is why you read the treating cases rather than trusting the icon alone.

A step-by-step good-law check

1. Confirm the citation is real. Pull the full opinion by its citation and verify the parties, court, and year. If you cannot find the case, stop; the cite may be wrong or fabricated. See AI hallucinations in legal research.
2. Check direct history. Was the decision appealed? Reversed or affirmed? Direct history is the same case moving up or down the courts.
3. Review citing references. Read the later cases that cited yours, focusing on those from courts that bind your jurisdiction.
4. Read the negative treatment first. If a signal flags the case, go straight to the cases that criticized or limited it and see whether the criticism touches the point you need.
5. Check the specific point, not just the case. A case can be good law for one rule and overruled for another. Confirm the rule you are citing is the rule that survived.
6. Note the jurisdiction. An out-of-state decision questioning your case does not necessarily affect whether it binds your court.

Why this step is non-negotiable

Courts expect lawyers to cite good law. Filing a brief that leans on an overruled precedent can draw a rebuke, cost you the motion, and damage your credibility for the rest of the matter. The duty is heightened when you draft a memo a colleague or client will act on; an overruled case quietly buried in your analysis spreads the error downstream. Build the check into your research routine, not as an afterthought. We walk through fitting it into a memo in how to write a legal research memo.

Make the good-law check fast

The hard part of shepardizing by hand is reading dozens of citing cases to find the one that matters. A citation check surfaces the still-good-law signal on every authority you pull, and links straight to the decisions that treated it, so you can confirm a precedent in seconds instead of an afternoon. Combined with plain-English case law search, you find the case and verify it in one place. This is the kind of guardrail that matters most for solo attorneys and small firms without a research librarian on call.

Casesearch is a legal research tool, not legal advice. Always read the full opinion and verify citations before relying on them.