From expertsdirect.com: Client legal privilege allows for confidentiality in lawyer-client communications, extending to documents created for the dominant purpose of obtaining legal advice or assisting in litigation, such as expert reports.

Experts must be cautious as submitting these reports can waive privilege over related communications, while the legal status of draft reports remains contentious, with courts differing on their protection.

To maintain privilege, lawyers should avoid disclosing privileged materials to experts, prefer verbal communications, and provide clear instructions regarding the use of documents.