Is an electronic signature valid?

Yes. Electronic signatures are generally enforceable under the ESIGN Act (15 U.S.C. §7001) and state UETA laws where adopted, provided the transaction meets intent, consent, attribution, and record-retention requirements.

Who can sign for a firm?

An attorney with delegated authority or an authorized firm officer can sign; the addendum should state who has authority. Confirm internal firm authorization and client consent to the signatory.

Do I need a notary or witness?

Most co-counsel addenda do not require notarization. If local court rules, client corporate bylaws, or specific state statutes require notarization or witness signatures, include the appropriate blocks.

How should conflicts be handled?

Conduct conflict checks for all firms, disclose any issues to the client, and obtain a written waiver when appropriate. Failure to do so can risk disqualification or malpractice claims.

Can the addendum be amended later?

Yes; include an amendment clause specifying approval procedures and signatures required. Amendments should be in writing and executed by the same parties who approved the original addendum.

What records should I keep?

Retain executed addenda and communications in the matter file. Follow federal minima (e.g., IRS three-year baseline) and industry rules such as HIPAA’s six-year retention where applicable.

Electronic Signature
Templates
Legal
Legal Co-Counsel Addendum

Legal Co-Counsel Addendum

This template is fully customizable. Edit the text, fill out the fields, and send it for signature. Give it a try!

LEGAL CO-COUNSEL ADDENDUM

This Legal Co-Counsel Addendum (the Addendum) is entered into as of by and between Lead Counsel: of and Co-Counsel: of with respect to representation of Client: in Case/Matter: .

RECITALS

WHEREAS, Lead Counsel is retained by Client to provide legal representation in the Matter described above and has authority to engage additional counsel where necessary to fulfill professional obligations; and

WHEREAS, Co-Counsel possesses experience, expertise or resources relevant to the Matter and the parties desire to define their respective roles, responsibilities, fee allocation and administrative procedures governing the co-counsel relationship; and

WHEREAS, Client has been notified of the proposed addition of Co-Counsel and has consented to such addition as required by governing rules of professional conduct, as reflected in the file or separate written consent if applicable.

NOW, THEREFORE

NOW, THEREFORE, in consideration of the mutual covenants set forth herein, the parties agree as follows:

1. ENGAGEMENT AND SCOPE

1.1 Engagement. Lead Counsel appoints Co-Counsel to serve as co-counsel in the Matter on the terms set forth in this Addendum. Co-Counsel accepts such appointment and agrees to perform legal services in accordance with applicable rules of professional conduct.

1.2 Scope of Services. Co-Counsel shall provide the following services:

2. FEE ALLOCATION AND BILLING

2.1 Allocation. The parties agree that fees recovered in the Matter, whether by settlement, judgment or other recovery, shall be allocated as follows: Lead Counsel: % and Co-Counsel: %. The parties will effectuate any reduction for statutory fees, liens, or agreed deductions prior to final allocation.

2.2 Fee Arrangement. Check the fee arrangement applicable to Co-Counsel's compensation: Hourly Contingency Flat Fee

2.3 Billing Procedures. If hourly billing applies, Co-Counsel shall bill at the hourly rate of $ and Lead Counsel shall bill at the hourly rate of $. All time entries shall be contemporaneously recorded in sufficient detail to permit review and shall be submitted monthly unless otherwise agreed in writing.

3. COSTS AND EXPENSES

3.1 Allocation of Expenses. Routine litigation expenses (filing fees, deposition costs, expert fees, travel) shall be advanced by and reimbursed from recovery before fee allocation unless otherwise agreed in writing.

3.2 Approval for Extraordinary Expenses. Any single expense exceeding $ requires prior written approval from the other counsel and Client where required by retained fee agreement.

4. CONFIDENTIALITY AND PRIVILEGE

4.1 Confidentiality. Each party agrees to maintain the confidentiality of information protected by attorney-client privilege or work product and to coordinate with the other party before disclosing privileged communications to third parties.

4.2 Joint Representation. To the extent communications are shared between Lead Counsel and Co-Counsel, the parties agree such communications shall be considered joint communications for the purposes of privilege, subject to applicable law and Client instructions.

5. CONFLICTS OF INTEREST

5.1 Representation Conflicts. Each party represents that, to the best of its knowledge after reasonable inquiry, it has no conflict that would materially affect its ability to represent Client in the Matter. If a conflict arises, the affected party shall promptly notify the other party and Client and take steps required by applicable rules of professional conduct.

6. AUTHORITY, INSTRUCTIONS, AND CLIENT CONSENT

6.1 Client Instructions. Lead Counsel shall remain the primary contact with Client for strategic decisions unless the parties agree otherwise in writing. Co-Counsel shall consult with Lead Counsel on material decisions and shall not unilaterally bind Client.

6.2 Client Consent. Client has provided informed consent to the addition of Co-Counsel as indicated by Client representation in the file. Client's consent, if executed separately, shall be attached to the file and incorporated by reference.

7. INDEMNIFICATION

7.1 Mutual Indemnity. Each party shall indemnify and hold harmless the other from and against any losses, liabilities or expenses (including reasonable attorneys' fees) arising from that party’s gross negligence, willful misconduct or material breach of this Addendum.

8. TERM, TERMINATION, AND SURVIVAL

8.1 Term. This Addendum shall commence on the Effective Date and shall continue until final disposition of the Matter, unless earlier terminated as provided herein.

8.2 Termination. Either party may terminate this Addendum upon written notice to the other party and Client for material breach, conflict of interest, withdrawal permitted by ethical rules, or good cause. Termination shall not affect accrued obligations, the obligation to account for fees and expenses, or preserve confidentiality and privilege.

9. RECORDS, AUDIT RIGHTS, AND COOPERATION

9.1 Records and Audit. Each party shall maintain time and expense records relating to the Matter. Upon reasonable notice, the other party and Client shall have the right to inspect such records to verify billings and expense allocations.

9.2 Cooperation. The parties shall cooperate in the defense or prosecution of the Matter, coordinate discovery and trial strategy, and avoid unnecessary duplication of effort.

10. NOTICES

Lead Counsel Notice Address Co-Counsel Notice Address

Notices shall be in writing and shall be effective upon personal delivery, electronic transmission with confirmed receipt, or three business days after deposit in the United States mail, postage prepaid, to the addresses set forth above or such other address as a party designates in writing.

11. AMENDMENTS, WAIVER, COUNTERPARTS

11.1 Amendments. This Addendum may be amended only by a written instrument signed by both parties and, if required, Client.

11.2 Waiver. No waiver of any provision of this Addendum shall be effective unless in writing and signed by the party against whom enforcement is sought. No waiver shall constitute a waiver of any other provision or a continuing waiver.

11.3 Counterparts. This Addendum may be executed in counterparts, each of which shall be deemed an original and all of which together shall constitute one instrument.

12. GOVERNING LAW; ENTIRE AGREEMENT; SEVERABILITY

12.1 Governing Law. This Addendum shall be governed by and construed in accordance with the laws of the State of without regard to that State's conflict of law rules.

12.2 Entire Agreement. This Addendum, together with any engagement letter or retainer agreement previously executed between Client and Lead Counsel, constitutes the entire agreement among the parties relating to the subject matter hereof and supersedes all prior oral or written agreements on such matter.

12.3 Severability. If any provision of this Addendum is determined to be invalid or unenforceable, the remaining provisions shall remain in full force and effect, and the parties shall endeavor in good faith to replace any invalid or unenforceable provision with a valid and enforceable provision achieving, to the extent possible, the parties' original intent.

ADDITIONAL PROVISIONS

Special Provisions or Limitations Additional Notes

Lead Counsel:

By:

Date:

Co-Counsel:

By:

Date:

What the Legal Co-Counsel Addendum Is

A Legal Co-Counsel Addendum is a written amendment to an existing engagement or retainer agreement that formalizes the addition of one or more co-counsel attorneys. It clarifies scope of work, division of responsibilities, fee-sharing arrangements, conflict disclosures, authority to act, confidentiality obligations, governing law, and signature lines for the parties. In U.S. practice the addendum serves to reduce malpractice risk by documenting client consent to fee splits and role allocation and can be attached to the primary engagement letter or filed with matter records.

Why a Co-Counsel Addendum Matters and Its Legal Foundation

The addendum reduces ambiguity about responsibility, records client consent to fee-sharing, and documents conflict waivers; it helps avoid disputes and malpractice exposure. Electronic execution is generally enforceable under the ESIGN Act (15 U.S.C. §7001) and state UETA statutes where adopted.

Who Typically Uses a Co-Counsel Addendum

Law firms and corporate counsel use co-counsel addenda to formalize multi-firm engagements and protect client interests.

Lead counsel and referring firms — establish primary duties and supervision responsibilities.
In-house legal departments — formalize outside co-counsel roles for specialty work or jurisdictional coverage.
Solo and boutique firms — set fee splits, client approvals, and communication responsibilities.

Solo practitioners, referral counsel, and litigation or transactional teams also use addenda to document responsibilities and billing arrangements.

Core Elements to Include in a Professional Addendum

A robust addendum is concise but complete: it identifies parties, defines scope and limits, spells out fee allocation, clarifies authority and reporting, addresses conflicts and confidentiality, and sets governing law and amendment procedures.

Parties

List full legal names of client, lead counsel, and each co-counsel, including firm names and primary contact information for service and billing.

Scope

Describe specific tasks or phases each counsel will perform, any geographic or subject-matter limits, and whether responsibilities are joint or delegated.

Fee Allocation

Set the precise fee split or hourly billing arrangements, who issues invoices, how costs are apportioned, and client consent to fee-sharing terms.

Authority

Specify which attorney(s) may enter appearances, negotiate settlements, and communicate with the client or opposing counsel on the matter.

Conflicts & Disclosures

Document conflict checks, any waivers obtained, and confirm that each lawyer is authorized to represent the client without disqualifying conflicts.

Governing Terms

Include confidentiality obligations, governing law, amendment process, termination rights, and signature blocks with dates for all parties.

Essential Fields to Include

Client Name: Full legal name

Lead Counsel: Firm name and attorney

Co-Counsel: Firm name and attorney

Effective Date: MM/DD/YYYY

Fee Split: Percentage or amount

Signature Block: Printed name, signature, date

Step-by-Step: Preparing and Executing a Co-Counsel Addendum

Follow a short sequence from drafting to execution to ensure the addendum is complete, consented to, and retained in the matter file.

01

Draft the Addendum: Prepare terms aligned with the engagement letter.
02

Perform Conflict Checks: Run conflicts for all firms before sending.
03

Obtain Client Consent: Provide the client with the addendum for written approval.
04

Execute and File: All parties sign; store executed copy in matter file.

Customizing and Completing the Addendum Online

Set up an electronic template with authentication, conditional fields, and a routing order to streamline co-counsel execution.

Field	Configuration
Document Type	Amendment template, PDF or DOCX
Authentication	Email + SMS code or KBA
Conditional Fields	Show fee split only if multiple counsel
Routing Order	Client → Lead Counsel → Co-Counsel

Where to Send and How to Submit the Executed Addendum

Clear routing ensures signatures and records reach the right recipients and the matter file remains complete.

Client Copy: Send executed PDF to client email on file.
Lead Counsel File: Store executed addendum in the matter management system.
Co-Counsel Records: Each firm retains an executed original or certified copy.
Court Filing: Attach when required by local court rules.

Distribution and eSignature Considerations

Ensure the chosen service can produce tamper-evident signed PDFs and export a certificate of completion; verify HIPAA, 21 CFR Part 11, or BAA needs for regulated matters.

File Formats: PDF and DOCX supported
Integrations: Works with Salesforce, NetSuite
Audit Trail: Captures IP, timestamp

Typical Timelines and Processing Expectations

Plan ahead for internal review, client approval, and execution to avoid delays in case work or filings.

Conflict Check Window:

Allow 24–72 business hours for thorough searches.

Client Review Period:

Seven business days is a common allowance.

Execution Turnaround:

Electronic signing often completes within 24–72 hours.

Court Filing Lead Time:

Check local rules; allow extra time for signatures.

Record Retention Start:

Retention runs from the effective or execution date.

Common Mistakes to Avoid

Using inconsistent legal names for parties, which can undermine enforceability and cause billing or discovery issues later.
Vague fee language that omits whether splits apply to recoverable costs, contingency awards, or net fees, causing client disputes.
Failing to document or obtain a written conflict waiver when a potential conflict exists, risking disqualification or malpractice claims.
Omitting routing or authority language so third parties cannot determine which attorney may negotiate or enter appearances.

Risks and Consequences of an Improper Addendum

Unenforceable Fees: Fee split may be rejected

Malpractice Exposure: Client claim for inadequate representation

Conflict Sanctions: Court sanctions or disqualification

Billing Disputes: Delayed or disputed invoices

Tax Reporting Issues: Incorrect 1099/1099-NEC reporting

Recordkeeping Failures: Noncompliance with retention rules

How the Co-Counsel Addendum Differs from Related Documents

Compare typical document alternatives so you select the correct instrument for the engagement and client expectations.

Document Type	Key Difference
Co-Counsel Addendum	adds co-counsel	allocates fees/responsibilities
Fee-Sharing Agreement	only fee terms	not scope-specific
Substitution of Counsel	replaces counsel	transfers authority
Engagement Letter	primary retainer	broader terms

eSignature Vendor Comparison for Executing a Co-Counsel Addendum

Compare basic pricing and capabilities relevant to executing and storing a co-counsel addendum electronically; signNow is listed first per vendor comparison conventions.

	signNow	DocuSign	Adobe Sign	PandaDoc	HelloSign
Starting Price	$8/user/mo	$15/user/mo	$14/user/mo	$19/user/mo	$15/user/mo
Free Trial	7-day free trial	Varies by plan	Varies by plan	Varies by plan	Varies by plan
Bulk Send	Yes (Business Premium)	Varies by plan	Varies by plan	Yes	Varies by plan
Audit Trail	Yes	Yes	Yes	Yes	Yes
HIPAA Compliant	Yes (BAA available)	Yes	Yes	No	No
Envelope Cap	No cap	100 envelopes/user/year	Varies by plan	Varies by plan	Varies by plan

Frequently Asked Questions About Co-Counsel Addenda

Answers to common questions on enforceability, signing authority, conflicts, e-signatures, notarization, and amendment help avoid routine mistakes.

Need help? Contact support

Is an electronic signature valid?
Yes. Electronic signatures are generally enforceable under the ESIGN Act (15 U.S.C. §7001) and state UETA laws where adopted, provided the transaction meets intent, consent, attribution, and record-retention requirements.
Who can sign for a firm?
An attorney with delegated authority or an authorized firm officer can sign; the addendum should state who has authority. Confirm internal firm authorization and client consent to the signatory.
Do I need a notary or witness?
Most co-counsel addenda do not require notarization. If local court rules, client corporate bylaws, or specific state statutes require notarization or witness signatures, include the appropriate blocks.
How should conflicts be handled?
Conduct conflict checks for all firms, disclose any issues to the client, and obtain a written waiver when appropriate. Failure to do so can risk disqualification or malpractice claims.
Can the addendum be amended later?
Yes; include an amendment clause specifying approval procedures and signatures required. Amendments should be in writing and executed by the same parties who approved the original addendum.
What records should I keep?
Retain executed addenda and communications in the matter file. Follow federal minima (e.g., IRS three-year baseline) and industry rules such as HIPAA’s six-year retention where applicable.

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