4th Cir.

Marvin v. CASA, Inc.

April 30, 2026 ·25-1223 ·Per Curiam · By Raj Patel

The United States Court of Appeals for the Fourth Circuit dismissed an appeal filed by a nonparty who attempted to challenge a district court order. The court held that the appellant lacked standing because he was not a party to the underlying litigation and had not sought leave to intervene or file an amicus brief.

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Background

Mark Marvin, proceeding pro se, filed a notice in the United States District Court for the District of Maryland that the court construed as an unauthorized amicus brief. Marvin sought to appeal the district court’s order returning his notice without docketing it. The district court advised Marvin that he had not sought leave to file an amicus brief nor had he moved to intervene.

The court’s reasoning

The court explained that it may exercise jurisdiction only over final orders under Section twelve ninety-one of Title twenty-eight of the United States Code, and certain interlocutory and collateral orders under Section twelve ninety-two of Title twenty-eight of the United States Code. The order Marvin seeks to appeal is neither a final order nor an appealable interlocutory or collateral order. Consequently, the court lacks jurisdiction to hear the appeal.

What it means going forward

The decision reinforces that individuals who are not parties to a lawsuit cannot bypass procedural requirements to appeal district court orders, ensuring that only proper parties or those with granted leave can participate in appellate review.

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