Which practice describes checking authorities to ensure they remain good law and noting how the cited authorities were treated?

• A. Shepardizing.
• B. Bluebooking.
• C. Motions for extension.
• D. Notice of appearance.

Answer: (A)

Checking authorities to confirm they are still good law and to see how subsequent cases treated them is what Shepardizing is about. When you research, you verify that a cited authority hasn’t been overturned, reversed, or weakened, and you look at how later decisions discuss it—whether they follow it, distinguish it, criticize it, or treat it as persuasive but not controlling. This process keeps your legal arguments grounded in authorities that actually stand up in current law and shows you how authorities have been treated in the courts over time. The other options aren’t about verifying authority status or treatment: Bluebooking is about formatting citations, motions for extension are procedural requests to extend deadlines, and a notice of appearance is a filing notifying the court you represent a party.