Who can sign the addendum?

An authorized signatory listed in the master services agreement or with written delegated authority should sign; otherwise the signature may be unenforceable.

Can the addendum be signed electronically?

Yes. Under the ESIGN Act (15 U.S.C. ch. 96) and UETA, electronic signatures are enforceable for most contracts unless a statutory exception applies.

Do I need a notary or witness?

Not usually for commercial services agreements, but state or industry rules may require notarization or witnesses for specific attachments or recordation; verify per state.

What if parties disagree after signing?

Follow the change-control and dispute-resolution clauses in the addendum and master agreement; preserve communications and signed revisions for evidence.

How should the executed addendum be stored?

Retain the signed PDF and audit trail in a secure repository with versioning and access controls for the retention period applicable to your industry and jurisdiction.

When is a Business Associate Agreement needed?

If the project requires access to protected health information, execute a HIPAA Business Associate Agreement and ensure HIPAA-compliant controls are in place.

Electronic Signature
Templates
Project Management
Project Management Addendum for Service

Project Management Addendum for Service

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

Project Management Addendum for Service

Project Identification

Project Title:

Project ID: Effective Date of Addendum:

Client Service Provider Project Manager (Service Provider)

Reference Agreement Date: This Addendum modifies the scope and terms of the agreement referenced above to incorporate the services, deliverables, schedule, and payment terms set forth below.

Scope of Work

Detailed Scope of Services Out-of-Scope Items

Changes to scope shall be effected only by a written change order signed by both parties. Change orders require written approval

Deliverables and Acceptance

Deliverable 1 Title:

Description Acceptance Criteria

Due Date:

Deliverable 2 Title:

Description Acceptance Criteria

Due Date:

Timeline and Milestones

Project Start Date Projected End Date Milestone 1

Target Date:

Milestone 2

Target Date:

Budget and Payment

Total Cost for Addendum Payment Schedule

Late payment interest:

Change Order Process

All work beyond the scope set forth herein will require a written change order documenting scope, cost, and schedule adjustments and signed by authorized representatives of both parties. Cost estimate required prior to authorization

Confidentiality and Data Protection

Each party shall keep confidential all proprietary information disclosed in connection with this Addendum and shall not use or disclose such information except as necessary to perform obligations under this Addendum. Confidential information does not include information that is or becomes publicly known through no breach of this Addendum or is independently developed. The receiving party shall implement commercially reasonable safeguards to protect confidential information.

Acknowledgement: I acknowledge that confidential information will be protected in accordance with this clause

Liability, Termination, and Governing Law

Limitation of Liability: Except for breaches of confidentiality or willful misconduct, neither party shall be liable to the other for consequential, incidental, or special damages arising out of this Addendum. The aggregate liability of either party for any claim arising from this Addendum shall not exceed the total fees paid under this Addendum.

Termination: Either party may terminate this Addendum upon ten (10) days' written notice if the other party materially breaches any obligation and fails to cure within the notice period. Termination does not relieve the Client of the obligation to pay for services performed and accepted through the termination date.

Governing Law

Acceptance and Final Provisions

Acceptance Procedure: Deliverables shall be submitted to the Client for review. The Client shall either accept deliverables in writing or provide a written statement of deficiencies within five (5) business days of receipt. If deficiencies are reported, the Service Provider shall correct such deficiencies within a mutually agreed timeframe. Acceptance shall be deemed granted if the Client fails to timely provide a statement of deficiencies.

Entire Agreement: This Addendum, together with the referenced agreement, constitutes the entire agreement of the parties with respect to the subject matter and supersedes any prior communications or representations. In the event of conflict, the terms of this Addendum shall control.

Administrative Details

Billing Contact Notice Address for Client Notice Address for Service Provider

Client:

By:

Date:

Service Provider:

By:

Date:

What the Project Management Addendum for Service Is

A Project Management Addendum for Service is a contract attachment that supplements a primary services agreement by documenting project-specific scope, deliverables, governance, roles, and change-control processes. It clarifies responsibilities between client and service provider for a discrete project or phase, sets timelines and milestone acceptance criteria, and records payment triggers tied to deliverables. The addendum is commonly used where the master services agreement is high-level and project particulars must be specified without re-drafting the main contract. It can be executed alongside or after the base agreement to preserve a clear contractual chain of obligations.

Why adding a Project Management Addendum matters

The addendum reduces ambiguity by converting informal project arrangements into contractual obligations, aligns payment to measurable milestones, and provides a repeatable change-control procedure that mitigates scope creep and disputes.

Who commonly creates and signs this addendum

Parties signing should ensure authorized signatories and any required approvals under the master agreement are followed to make the addendum binding.

Project Managers and PMOs who translate scope and schedule into enforceable milestones.
Procurement and Contracts teams that manage supplier terms and invoicing triggers.
Client stakeholders or department heads who approve deliverables and acceptance criteria.

Core elements to include in a professional addendum

A complete Project Management Addendum for Service organizes the project-specific terms so they integrate with the master contract without conflict and provide an operational roadmap for execution, acceptance, and change management.

Scope of Work

Concise, task-level description of deliverables, exclusions, and measurable acceptance criteria that prevent differing interpretations during execution.

Schedule & Milestones

Defined milestone names, delivery dates, and conditions for acceptance that trigger review and invoicing.

Responsibilities

Role matrix listing client and provider duties, points of contact, escalation paths, and decision rights to speed issue resolution.

Change Control

Formal amendment process with request, impact assessment, approval thresholds, and adjustments to cost or schedule.

Payment Terms

Milestone-based payments, invoice requirements, and withholding or retention terms tied to acceptance criteria.

Termination & Remedies

Project-specific termination rights, cure periods, and remedies that operate alongside the master services agreement.

Required information typically captured

Parties: Full legal names

Effective Date: MM/DD/YYYY

Project Name: Short title

Scope Summary: Deliverable list

Milestones: Dates and criteria

Signatories: Authorized signers

Step-by-step: executing the addendum

Follow these sequential steps to prepare, approve, and execute a Project Management Addendum for Service with minimal friction.

01

Draft: Populate scope, milestones, and payment triggers tied to the master agreement.
02

Review: Legal and procurement review for consistency with existing contract terms.
03

Approve: Obtain internal approvals and confirm signatory authority.
04

Execute: Sign, date, and distribute fully executed copies to stakeholders and project teams.

Setting up the addendum workflow for online completion

Configure a digital workflow that maps the addendum fields to roles for routing, authentication, and storage before sending for signature.

Field	Configuration
Signers	Role-based order (Provider → Client approver)
Authentication	Email link by default; use SMS or ID verification for added assurance
Conditional Fields	Show additional scope details only if change-control selected
Storage	Save final PDF + audit trail to secure repository

Where to send, file, and distribute the executed addendum

Plan a single canonical routing path so all parties, finance, and project teams reference the same executed copy.

Project Folder: Upload signed PDF and attachments to the project document repository
Finance: Send invoice trigger notice to accounts payable with milestone reference
Project Team: Distribute acceptance criteria and change-control steps to PMO
Contract Archive: File executed addendum with master agreement in legal records

Digital signing and technical requirements

Ensure audit trails, access controls, and any required BAAs or regulatory controls are in place prior to signing.

Document Formats: PDF, DOCX supported
Integrations: CRM/ERP connectors like Salesforce or NetSuite
Security: TLS 1.2/1.3; AES-256 at rest

Common pitfalls to avoid

Vague acceptance criteria that delay sign-off and payment.
Signing by an unauthorized person under the master agreement.
Omitting change-control steps, which leads to scope creep.
Failing to attach referenced exhibits or schedules before execution.

Consequences of an incorrect or incomplete addendum

Payment Delays: Invoices may be rejected if milestones lack measurable criteria

Contract Disputes: Ambiguity can lead to litigation or arbitration

Regulatory Risk: Improper data handling may violate HIPAA or industry rules

Tax Exposure: Incorrect party names affect 1099 reporting

Invalid Signature: Missing authorized signature may render addendum unenforceable

Operational Delays: Work pauses until scope and approvals are clarified

Key timing considerations and typical deadlines

Track dates in the addendum carefully; timing affects acceptance, invoicing, and statutory obligations.

Effective Date:

Same-day effect when signed unless a future date is specified

Milestone Due Dates:

Specific dates in MM/DD/YYYY format as entered

Invoice Submission:

Usually within 30 days of milestone acceptance

Change Notice Window:

Typical 5–15 business day review period

Retention Trigger:

Retention periods commence from effective or termination date

Milestone lifecycle from kickoff to closeout

Numbered stages help teams understand where contractual obligations and approvals occur across the project lifecycle.

01

Kickoff

Project initiation and mobilization; baseline schedule established.

02

Delivery

Provider submits deliverable as defined in milestone description.

03

Review

Client reviews against acceptance criteria within the agreed window.

04

Acceptance & Payment

Formal acceptance triggers invoicing and payment per terms.

Comparing eSignature vendor pricing and core limits

High-level pricing and feature differences for eSignature plans; signNow appears first as the platform referenced for compliance and cost context.

	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	Varies	Varies	Varies
Bulk Send	Yes	Yes	Yes	Yes	No
Audit Trail	Yes	Yes	Yes	Yes	Yes
HIPAA Compliant	Yes	Yes	Yes	No	No
Envelope Cap	No cap	100 envelopes/user/year	Varies	Varies	Varies

Frequently asked questions about the addendum

Answers to common operational and legal questions encountered when preparing or executing a Project Management Addendum for Service.

Need help? Contact support

Who can sign the addendum?
An authorized signatory listed in the master services agreement or with written delegated authority should sign; otherwise the signature may be unenforceable.
Can the addendum be signed electronically?
Yes. Under the ESIGN Act (15 U.S.C. ch. 96) and UETA, electronic signatures are enforceable for most contracts unless a statutory exception applies.
Do I need a notary or witness?
Not usually for commercial services agreements, but state or industry rules may require notarization or witnesses for specific attachments or recordation; verify per state.
What if parties disagree after signing?
Follow the change-control and dispute-resolution clauses in the addendum and master agreement; preserve communications and signed revisions for evidence.
How should the executed addendum be stored?
Retain the signed PDF and audit trail in a secure repository with versioning and access controls for the retention period applicable to your industry and jurisdiction.
When is a Business Associate Agreement needed?
If the project requires access to protected health information, execute a HIPAA Business Associate Agreement and ensure HIPAA-compliant controls are in place.

be ready to get more

Join over 28 million airSlate SignNow users

Sign Now