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Service Add-On Agreement

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SERVICE ADD-ON AGREEMENT

This Service Add-On Agreement ("Agreement") is entered into as of the Effective Date set forth below by and between the parties identified herein.

Parties

Client Name:

Client Address:

Service Provider Name:

Service Provider Address:

Recitals

WHEREAS, the Client and Service Provider are parties to a primary services agreement described as the Master Services Agreement executed between the parties on or about (the "Master Agreement");

WHEREAS, the parties desire to add certain additional services and related fees, terms and conditions to the Master Agreement subject to the terms of this Service Add-On Agreement; and

WHEREAS, the parties agree that the performance of the additional services and any associated fees shall be governed by the provisions set forth below;

Scope of Work

The Service Provider shall perform the add-on services described above in a professional and workmanlike manner consistent with industry standards. Any material changes to scope shall be made only by written Change Order signed by authorized representatives of both parties. The Service Provider shall assign competent personnel and shall remain responsible for subcontractor performance under the terms of this Agreement.

Payment Terms

Invoicing shall occur in accordance with the Payment Schedule. All invoices are payable in U.S. dollars within days of receipt unless otherwise specified. Client shall not withhold payment for disputed items provided the dispute is raised in writing within days of invoice.

Late Fee: Any overdue amount shall bear interest at per month (or the maximum rate permitted by law, if less) plus reasonable collection costs, including attorneys' fees.

Term and Termination

Effective Date: . Termination Date (if applicable):

This Agreement shall commence on the Effective Date and continue until completion of the Scope of Work or the Termination Date, whichever occurs first. Either party may terminate this Agreement for material breach by the other party if the breach remains uncured for days after written notice. Either party may terminate for convenience upon days' prior written notice to the other party.

Upon termination, Client shall pay for all work performed and reasonable costs incurred through the effective date of termination. Sections that by their nature survive termination shall survive, including confidentiality, indemnification and payment obligations.

Confidentiality

Each party (the "Receiving Party") shall keep confidential and shall not disclose to any third party any non-public proprietary or confidential information of the other party (the "Disclosing Party") disclosed in connection with this Agreement. Confidential information does not include information that (a) is or becomes generally available to the public through no act or omission of the Receiving Party; (b) was in the Receiving Party's lawful possession prior to disclosure; (c) is lawfully disclosed to the Receiving Party by a third party without restriction; or (d) is independently developed by the Receiving Party without use of the Disclosing Party's confidential information.

The Receiving Party may disclose Confidential Information to its employees, contractors or advisors who have a need to know and who are bound by confidentiality obligations at least as protective as those contained herein. The obligations of confidentiality shall survive termination or expiration of this Agreement for years.

Representations and Warranties

Each party represents and warrants that it has the full power and authority to enter into this Agreement and to perform its obligations hereunder. Service Provider warrants that the services provided under this Agreement will be performed in a professional manner in accordance with generally accepted industry standards. EXCEPT AS EXPRESSLY SET FORTH IN THIS AGREEMENT, THE SERVICES ARE PROVIDED "AS IS" AND SERVICE PROVIDER DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, TO THE MAXIMUM EXTENT PERMITTED BY LAW.

Limitation of Liability

Except for liability arising from gross negligence, willful misconduct, or breach of confidentiality, neither party shall be liable to the other for indirect, incidental, consequential, punitive or special damages. Each party's aggregate liability for claims arising out of or related to this Agreement shall not exceed the total fees actually paid by Client to Service Provider under this Add-On Agreement.

Governing Law

This Agreement shall be governed by and construed in accordance with the laws of the State of without regard to conflicts of law principles. Exclusive venue for any dispute shall be in the courts located in the governing jurisdiction specified above, unless otherwise required by mandatory law.

Entire Agreement

This Agreement, together with the Master Agreement and any signed Change Orders specifically referencing this Add-On Agreement, constitutes the entire agreement between the parties with respect to the subject matter hereof and supersedes all prior and contemporaneous agreements, proposals, negotiations, and communications, whether oral or written. No amendment or waiver of any provision of this Agreement will be effective unless made in writing and signed by authorized representatives of both parties.

Miscellaneous

Assignment: Neither party may assign its rights or delegate its duties under this Agreement without the prior written consent of the other party, except that Service Provider may assign to an affiliate or in connection with a merger, sale of substantially all assets or corporate reorganization.

Notices: All notices required or permitted under this Agreement shall be in writing and shall be deemed given when delivered personally, sent by nationally recognized overnight courier, or three business days after deposit in the U.S. mail, postage prepaid, to the addresses set forth above or such other address as a party may specify by notice hereunder.

Client:

By:

Date:

Service Provider:

By:

Date:

Enter text✕

What a Service Add-On Agreement Covers

A Service Add-On Agreement documents additional services, fees, and schedules appended to an existing contract between a service provider and a client. It clarifies scope changes, pricing adjustments, delivery timelines, responsibilities, and termination or billing effects. When executed, the add-on becomes part of the original contract and should reference the base agreement, effective date, and any required approvals to avoid disputes. Use clear language so obligations and payment triggers are unambiguous and enforceable under ESIGN Act and applicable state law when signed electronically.

Why a Clear Add-On Agreement Matters

A concise Service Add-On Agreement reduces disputes by documenting scope, cost, and timing for extra work. It preserves contractual clarity for billing, insurance, and regulatory compliance while creating a record suitable for electronic signing and audit trails.

Why a Clear Add-On Agreement Matters

Who Typically Prepares and Signs Add-Ons

Teams that manage contracts and deliveries routinely create and sign add-ons to capture mutually agreed scope or price changes.

  • Service account managers and contracts teams who need to formalize scope changes and fees.
  • Procurement or purchasing departments that approve and document vendor change orders for records.
  • Clients' project managers or authorized procurement officers who accept additional services and associated costs.

Clear role assignment for preparation, review, and signature reduces approval delays and ensures only authorized representatives bind their organizations.

Typical Signatory Roles

Authorized Signer

A named individual with delegated authority to bind the organization. Provide job title, delegation basis, and confirm corporate authorization or purchase order reference.

Contract Administrator

Operational owner who documents technical scope, schedules performance milestones, and coordinates billing changes; not always the final signer but responsible for accuracy.

Core Elements to Include in an Add-On

A professional Service Add-On Agreement contains specific, enforceable terms that tie directly to the original contract and reduce ambiguity.

Reference

Identify the base contract by title, date, and parties so the add-on is clearly linked and enforceable as part of the original agreement.

Scope

Describe the additional services in measurable terms, deliverables, and acceptance criteria to avoid disputes about what the add-on obligates each party to deliver.

Pricing

State fixed fees or rates, payment schedule, and invoicing triggers; include tax treatment and any contingency for expenses or travel.

Timing

Provide effective date, service start and end dates, milestone deadlines, and any liquidated damages or delay remedies if applicable.

Change Control

Define how further changes will be requested, approved, and priced to prevent informal scope creep and billing disagreements.

Signatures

Include signature blocks for all required parties, printed names, titles, dates, and optional witness/notary sections when state law requires them.

Step-by-Step: How to Complete the Add-On

Follow these sequential steps to prepare, approve, and execute a Service Add-On Agreement with minimal friction.

  • 01
    Draft: Describe scope, price, and schedule in plain language.
  • 02
    Attach Exhibits: Include SOWs, price tables, and any supporting documents.
  • 03
    Internal Approval: Obtain procurement and legal sign-off before sending.
  • 04
    Execute: Collect signatures, date, and return executed copies to all parties.

Typical Electronic Execution Workflow

Electronic workflows speed execution and provide an audit trail; the sequence below is typical for online signing platforms.

  • Upload Document: Sender uploads the add-on PDF or DOCX and verifies content.
  • Place Fields: Insert signature, date, and initial fields for each signer.
  • Set Authentication: Choose authentication: email, SMS code, or KBA as required.
  • Send and Audit: Send invites; completed file plus audit trail is stored.

Configuring an Online Add-On Signing Flow

Recommended settings for a reliable, legally defensible electronic signing process.

Field Configuration
Signature Type Visible signature with audit trail and timestamp
Authentication Email link plus optional SMS code for higher assurance
Notifications Reminders at 3 and 7 days if unsigned
Retention Store signed PDF with certificate and attachments

Technical and Security Considerations for eSigning

Ensure platform capabilities align with compliance, authentication, and integration needs before eSigning.

  • File Formats: PDF, DOCX supported
  • Integrations: CRM and cloud storage links
  • Audit Trail: IP, timestamp, action log

Choose a platform that supports secure storage, export formats, and the authentication level required by your industry and state rules.

eSignature Vendor Comparison for Add-On Execution

Basic pricing and feature contrasts to help evaluate eSignature vendors for executing Service Add-On Agreements; signNow is listed first per 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 Free tier available Free trial available
Bulk Send Yes (premium) Yes Yes Yes Yes
Audit Trail Yes Yes Yes Yes Yes
HIPAA Compliant Yes (BAA) Yes Yes No No
Envelope Cap No cap 100 envelopes/user/year Varies Varies Varies

Security and Compliance Items to Verify

Encryption: TLS 1.2/1.3 in transit; AES-256 at rest
Audit Trail: IP, timestamp, and action log retained
Certifications: SOC 2 Type II and ISO 27001 available
HIPAA: BAA required for protected health information
21 CFR Part 11: Supported for FDA-regulated records
Accessibility: WCAG 2.0 Level AA compliance

Key Risks and Potential Penalties

Tax Reporting: Incorrect reporting can trigger IRC §6721 penalties
I-9 Noncompliance: Paperwork fines range $281–$2,789 per violation
Unauthorized Signatures: May void the add-on and expose parties to breach claims
HIPAA Violations: Civil and criminal penalties for PHI mishandling
Intentional Misreporting: High penalties with no statutory maximum per IRC rules
Lost Records: Failure to retain records risks audit and compliance fines

Common Mistakes to Avoid

  • Failing to reference the base contract explicitly, which can create disputes about whether the add-on is binding or standalone.
  • Using vague scope language like 'additional services as required' without quantifiable deliverables or acceptance criteria.
  • Collecting signatures from unauthorized individuals or failing to document delegation of signing authority for corporate entities.
  • Omitting price adjustments or tax treatment, leading to billing disagreements and delayed payments.

Typical Timing and Deadlines to Track

Track execution, notice, and billing deadlines to ensure the add-on takes effect and invoices are processed on time.

Execution Date:

Date parties sign; controls when added obligations commence.

Service Start:

When additional work begins, often tied to execution or a specified start date.

Invoice Due:

Payment terms (e.g., Net 30) measured from invoice date or milestone completion.

Amendment Notice:

Time to notify counterparties of changes, commonly 30 days for material modifications.

Record Retention:

Confirm how long signed add-ons are stored per retention policy.

Practical Examples of Add-On Use

Real-world examples illustrate why clarity and correct execution matter when modifying ongoing service contracts.

Martin Properties

Tim Martin used an online add-on to formalize extra property maintenance work and additional fees.

  • The add-on tied directly to the lease exhibit and pricing table.
  • By executing electronically with a clear scope and schedule, the company avoided a service delay and preserved enforceable billing terms across multiple properties while reducing back-and-forth approvals.

Fertility Centers

John Butler added a technology services module to an existing vendor agreement to support telehealth.

  • The add-on specified data handling and schedules.
  • Including HIPAA-related provisions and attaching a BAA helped the center meet compliance needs while enabling remote signature and rapid rollout of the new service module.

Practical Tips for Accurate and Efficient Add-Ons

Apply these pragmatic practices to minimize rework, legal exposure, and approval delays when preparing add-ons.

Use Standard Templates
Maintain an approved add-on template with required clauses, exhibit placeholders, and signature blocks to reduce drafting errors and speed legal review.
Number Exhibits
Attach numbered exhibits or SOWs and reference them in the add-on to prevent ambiguity about deliverables or pricing tables.
Limit Attorney Review
Reserve legal review for material changes only; for routine pricing updates use an approved template and checklist to save time and cost.
Log Version History
Keep a clear version and execution history showing who approved and when; this aids audits and dispute resolution.

Frequently Asked Questions About Service Add-On Agreements

Answers to common legal, signing, and retention questions when preparing or executing a Service Add-On Agreement.


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