Centralized Subpoena Unit

Liberty Mutual Insurance (“Liberty”) has a department dedicated to processing third-party subpoenas served on Liberty’s domestic affiliates.  This department works with Liberty attorneys to review and enforce service of process compliance, collaborate and cooperate with key internal and external stakeholders and refer or respond depending on the nature of the request and the business segment involved.

Service of Process 

Liberty requires that service of process be made in full compliance with applicable law and state DOI guidelines and will not accept service of process by any means not specifically authorized.  Improperly served subpoenas will be rejected via correspondence  which will include service of process instructions for your jurisdiction.

Corporation Service Company is Liberty’s designated Registered Agent in many states, but we encourage you to reach out to your state’s DOI for accurate and up-to-date service of process information.  You may also contact our department via one of the methods outlined below.

In addition to service of process, it is imperative that your subpoena conform to federal, state and local guidelines.  This could include, but is not limited to:

  • Complete and accurate case caption
  • Valid, active case number
  • Proof of service
  • Signed and dated
  • Notice to opposing parties
  • Authorization for release of records

Scope of Request Recommendations 

Vague requests or incorrect information may result in limited responses based on good faith interpretation of scope or require additional research which may cause delays.  For efficient processing, we recommend including the following in your request:

  1. Type of record requested with claim number(s) or policy number(s), if known.
  2. Line of business, if applicable.
  3. Proper underwriting company, if known.
  4. PII (in accordance with any local privacy laws) – full name, date of birth, SSN/EIN.
  5. An authorization for release of medical records (jurisdiction-specific requirement).
  • If you are seeking medical records on a minor or incapacitated individual (presently or at time of loss), Liberty requires an authorization to accompany the subpoena.

Invoicing & Payment 


Liberty reserves the right to charge reasonable copying costs, cancellation fees and labor fees.    Payment is appreciated within 30 days and unpaid invoices may be subject to collections.

Generally, invoicing is as follows:

  • Labor: $25.00/hour*
  • Electronic copies: $0.25/page*

*Charges in CA as follows: $24.00/hour and $0.10/page


Payment can be made electronically via our secure portal (preferred) or by physical check.  To ensure proper allocation, it is imperative that you include the 8-digit Liberty invoice number with your online payment or written on your physical check and submit one payment for each invoice received (payments covering multiple invoices could result in improper allocation).

PORTAL: https://ipn4.paymentus.com/rotp/lmlt 


  • Payments made with incorrect or missing invoice numbers could result in incorrect payment allocation.
  • For proper allocation, a single payment must be entered for each invoice. Bulk payments covering multiple invoices or making multiple, smaller payments against an invoice could result in incorrect payment allocation.

PHYSICAL CHECK:  Made payable to Liberty Mutual Insurance.  Please remit to:

LM - Centralized Subpoena Unit
P.O. Box 735338
Chicago, IL  60673-5338

Contact Information 

When contacting our department for status or general inquiries, please provide your reference number or case number and plaintiff’s name.  When contacting with a billing question, please provide Liberty’s 8-digit invoice number.