Chain of Custody Example: A Real eDiscovery Walkthrough

The clearest way to understand the chain of custody is to watch it succeed and watch it fail. Below are two versions of the same eDiscovery scenario: one where the chain holds, and one where it quietly breaks. The evidence is identical. Only the handling differs.

Chain of Custody Examples in eDiscovery

A company is sued. A key custodian, i.e., a sales director, has a mailbox of emails relevant to the dispute. The legal team needs those emails to be admissible. Here's how the same set of emails ends up either defensible or worthless.

Example A: The chain breaks

1. The paralegal asks the custodian to forward the relevant emails to her. (Self-collection, and forwarding rewrite the metadata.)
2. She saves them to a shared drive. (No hash was ever taken, so there's no baseline to verify against.)
3. Weeks later, she uploads them to a review tool. (No log records of who moved the data, when, or how.)
4. Opposing counsel asks how the emails were collected and preserved. No one can answer with documentation.

Result: the emails may be perfectly genuine, but the team can't prove it. The fight shifts from what the emails say to whether anyone can trust them, and that's a fight you can lose with the truth on your side. This is exactly what happens when the chain of custody is broken.

Example B: The chain holds

1. Legal issues, a legal hold, and documents the scope before anything is collected.
2. A qualified collector uses a forensically sound method to collect the mailbox, generating a SHA-256 hash at the point of collection and recording the source, date, time, and method.
3. During processing, the platform re-verifies the hash after ingestion and logs every step.
4. In review, role-based access controls apply and every action is captured in an audit log.
5. At production, a final hash verification runs, the format and any redactions are documented, and the production log is retained with the matter file.

Result: when opposing counsel asks how the emails were handled, the team produces a complete, hash-verified record. Under FRE 902(14), that record may even let them self-authenticate the evidence without putting the collector on the stand.

What the example teaches

• Authenticity isn't enough, provability is: Both versions used the same real emails.
• The hash is the hinge: Example B is defensible largely because a value was captured at collection and re-verified.
• Handoffs are where chains break: Every untracked move in Example A added risk.
• Documentation has to be contemporaneous:  A log written after the fact is what invites a challenge.

Build a record like Example B

Example B is realistic only when custody tracking is built into the workflow rather than bolted on. To see the full framework behind it, the lifecycle steps, what a defensible record contains, and a free chain of custody form, read our complete guide to chain of custody in eDiscovery.

Turn Best Practices Into Everyday Practice

A defensible chain of custody isn't the result of perfect documentation after the fact. It's the outcome of a workflow that captures every collection, transfer, review, and production step as the work happens.

If you're looking to strengthen your evidence handling process or reduce custody risks across your eDiscovery matters, we'd be happy to discuss how Venio can help, so contact us today!

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