Pension Committee v. Banc of America: How Blockchain Anchoring Changes Preservation Calculus

The case

Pension Committee of the University of Montreal Pension Plan v. Banc of America Securities, LLC involved claims arising from the collapse of asset-backed commercial paper conduits during the 2007 financial crisis. The plaintiff pension fund alleged that defendants failed to disclose material risks, leading to substantial losses. The case reached the Southern District of New York on discovery sanctions for the defendants' handling of electronically stored information during litigation.

What the court held

Judge Scheindlin held that gross negligence in preservation could support adverse-inference instructions, establishing a framework where culpability levels determined appropriate sanctions. The court articulated tiers ranging from ordinary negligence (requiring curative measures) through gross negligence (permitting adverse inference) to willful destruction (allowing case-terminating sanctions). This standard was subsequently narrowed by the 2015 amendments to Federal Rule of Civil Procedure 37(e), which now require intent to deprive for adverse-inference, dismissal, or default sanctions, limiting negligent preservation failures to curative measures only.

Where blockchain anchoring fits

The Pension Committee decision turned on whether defendants could demonstrate reasonable preservation efforts once litigation became reasonably foreseeable. Blockchain anchoring fundamentally changes this calculus by creating an immutable preservation record from the moment files are created or modified. A SHA-256 hash anchored to both Polygon and Bitcoin establishes that specific file content existed at the timestamp recorded on both chains. This proof persists regardless of what happens to the original files afterward.

Under the current FRCP 37(e) framework, parties must show they acted reasonably to preserve relevant ESI. Blockchain anchoring provides objective evidence of preservation timing that cannot be disputed or destroyed. When a document is anchored before litigation hold obligations begin, the hash record proves the file existed in that specific state before any duty to preserve arose. If the same file is modified after the litigation hold, a subsequent anchor would show different hash values, creating an auditable timeline of when changes occurred.

The verification process works independently of any single party's systems. The verify-proof package allows offline local verification using only the file and the blockchain record. Opposing counsel, courts, or forensic experts can verify file integrity without accessing the producing party's servers or trusting their representations about when preservation began.

The takeaway for practitioners

Preservation duties run from the moment litigation becomes reasonably foreseeable, but proving when preservation actually began often depends on party representations that courts may view skeptically. Blockchain anchoring creates contemporaneous, third-party evidence of preservation timing that satisfies FRCP 37(e)'s reasonableness standard. Under FRE 901(b)(9), courts can authenticate blockchain records as evidence from a process that produces accurate results, while FRE 902(13) permits self-authentication of the machine-generated hash records through written certification.

The Pension Committee framework may be history, but the underlying preservation challenge remains. Intent requirements under amended FRCP 37(e) are harder to prove, making reliable preservation documentation more valuable for avoiding sanctions disputes entirely.