Financial, property, and valuation disputes frequently require expert assistance. Whether communications with an expert remain protected depends heavily on who retained the expert, the role the expert serves, and whether the expert is later presented as a witness.

A Consulting Expert May Assist Privately

An attorney may initially retain an expert solely as a consultant. In that role, the expert can help counsel evaluate financial records, test assumptions, identify weaknesses, and prepare litigation strategy.

Communications with an expert retained by counsel as a consultant are generally protected. This allows the attorney and consultant to evaluate the case candidly without automatically disclosing the consultant’s opinions through discovery.

The Attorney Should Make the Retention

Protection may not apply when the client independently hires the expert rather than having counsel retain the expert. An attorney generally cannot convert work previously performed for the client into protected attorney work merely by adopting it later.

The retention agreement should accurately identify the expert’s consulting role. Payment arrangements should also be handled carefully because financial records may disclose the expert’s identity even when the substance of the consultation remains protected.

Existing Information Does Not Become Privileged Automatically

Hiring a consultant does not make every document reviewed by that person confidential. Records and communications that were not protected before the consultation generally do not become privileged simply because they are delivered to an expert.

The distinction is particularly important when the consultant previously treated a party, performed unrelated work, or received information before being retained by counsel. Protection depends on the nature and timing of the communication.

Testifying Can Change the Expert’s Status

Once an expert is designated to testify or the expert’s opinion is introduced in court, broad confidentiality protections are generally lost. The opposing party may then obtain discovery concerning the expert’s opinions, notes, communications, and materials reviewed or relied upon.

Submitting an expert declaration can have a similar effect. The decision to use a consultant as a witness should therefore be made only after considering the disclosure consequences.

A California family-law attorney can retain an expert in the appropriate capacity, protect confidential consultation to the extent permitted, and evaluate whether the value of presenting the expert’s testimony outweighs the resulting discovery obligations.