Can an addendum be e-signed?

Yes. Electronic signatures are generally enforceable under the ESIGN Act (15 U.S.C. ch. 96) and UETA in most states, provided intent, consent, attribution, and reliable record retention are present.

Is notarization required?

Not typically for a Product Service Addendum. Notarization or witnesses are only needed when state law or a specific title, real estate, or statutory requirement applies.

What if signer names do not match IDs?

Mismatched names can create enforceability questions. Ensure legal entity names and signer names match corporate records or provide an officer certificate confirming authority.

How long must I keep executed addenda?

Retain executed addenda for the contract term plus recommended post-termination periods (commonly 3–7 years); follow IRS and HIPAA retention where applicable.

Are click-to-sign checkboxes valid?

Yes if they demonstrate intent, consent, and attribution and are captured in an audit trail; consumer-facing transactions may require ESIGN consumer disclosures.

What happens if a required field is left blank?

Missing pricing or signature fields can render an addendum unenforceable or cause processing delays; validate required fields before distributing for signature.

Electronic Signature
Templates
Miscellaneous
Product Service Addendum

Product Service Addendum

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

PRODUCT SERVICE ADDENDUM

This Product Service Addendum (the "Addendum") is entered into effective as of by and between the parties identified below. This Addendum supplements and modifies the applicable Master Services Agreement or Service Order as set forth herein.

Client Name: Service Provider Name:

WHEREAS

WHEREAS, Client requires the supply, installation, maintenance or other services related to certain products described in this Addendum (the "Products");

WHEREAS, Service Provider represents that it possesses the skill, personnel, facilities and experience necessary to provide the Products and Services in accordance with the terms of this Addendum; and

WHEREAS, the parties desire to set forth the specific scope, payment, term and other provisions governing the Products and Services to be provided by Service Provider.

SCOPE OF WORK

Service Provider shall perform the work and supply the Products as described below. Unless expressly stated otherwise, all deliverables shall conform to the specifications, quantities and schedules set forth in this Section.

Detailed Description of Products and Services: Itemized Products / Services (if applicable):

Item 1 Description:

Item 2 Description:

PAYMENT TERMS

Client shall pay Service Provider for the Products and Services in accordance with the amounts and schedule set forth below. All sums are payable in lawful currency and are exclusive of applicable taxes unless otherwise stated.

Total Contract Amount: Payment Schedule and Milestones: Late Payment Fee:

Invoices shall be due within the period set forth in the payment schedule. Client shall pay undisputed amounts by the due date. Disputes to invoice items must be submitted in writing and will not relieve Client of its obligation to pay undisputed portions when due.

TERM AND TERMINATION

This Addendum commences on the Start Date and, unless earlier terminated in accordance with this Section, will continue through the End Date.

Start Date:

End Date:

Notice Period for Termination Without Cause:

Either party may terminate this Addendum for material breach if the breaching party fails to cure such breach within thirty (30) days after written notice. Termination shall be without prejudice to any rights or remedies accrued prior to termination.

CONFIDENTIALITY

"Confidential Information" means information disclosed by one party to the other, whether orally or in writing, that is designated as confidential or that reasonably should be understood to be confidential given the nature of the information and the circumstances of disclosure. Each party shall (i) hold Confidential Information in strict confidence, (ii) not disclose it to any third party except as permitted herein, and (iii) use it solely to perform its obligations under this Addendum.

Confidential Information does not include information that: (a) is or becomes publicly available through no fault of the receiving party; (b) is rightfully received from a third party without restriction; (c) is independently developed by the receiving party without use of the disclosing party's Confidential Information; or (d) is required to be disclosed by law or court order provided the receiving party gives prompt notice and cooperates with any efforts to limit disclosure.

Confidentiality Duration:

GOVERNING LAW

This Addendum shall be governed by and construed in accordance with the laws of the state identified below, without regard to conflict of laws principles.

Governing State:

ENTIRE AGREEMENT

This Addendum, together with the Master Services Agreement and any exhibits or statements of work expressly incorporated herein, constitutes the entire agreement between the parties with respect to the subject matter and supersedes all prior and contemporaneous agreements, understandings and communications, whether written or oral. Any amendment to this Addendum must be in writing and signed by authorized representatives of both parties.

MISCELLANEOUS

Neither party may assign this Addendum without the prior written consent of the other party, except that Service Provider may assign to an affiliate or in connection with a merger or sale of substantially all of its assets. If any provision of this Addendum is held to be invalid or unenforceable, the remaining provisions shall remain in full force and effect.

Client:

By:

Date:

Service Provider:

By:

Date:

What the Product Service Addendum Is

A Product Service Addendum is a contractual attachment that specifies additional or amended terms governing the delivery, support, pricing, warranties, and service levels for a particular product or service. It sits alongside a master agreement or purchase order and clarifies scope, responsibilities, deliverables, acceptance criteria, change control, and any special billing or support arrangements. The addendum can replace or supplement standard contract language for a specific implementation, product release, or customer segment and is often used to memorialize negotiated deviations from a template agreement.

Why a Product Service Addendum Matters

A clear addendum reduces ambiguity by documenting product scope, service levels, fees, and timelines, which lowers dispute risk and aligns expectations across parties.

Which parties typically prepare and sign an addendum

The Product Service Addendum is most often completed by contracting parties when the base agreement needs product- or engagement-specific detail.

Vendor account managers and contract administrators who need to record product specifications and support commitments.
Procurement or purchasing teams that must document pricing, billing milestones, and acceptance criteria.
Customer legal or operations teams that require explicit warranty, SLA, or termination triggers.

Ensure each party reviews authority to sign and that the addendum references the correct master agreement and effective date.

Core elements to include in a professional Product Service Addendum

A thorough addendum groups commercial, technical, and administrative terms so reviewers can quickly locate obligations and remedies.

Scope

Define the exact products, services, deliverables, and exclusions so parties share the same expectations and avoid scope creep.

Term & Renewal

Specify the effective date, contract term, renewal mechanics, and early-termination consequences tied to the underlying master agreement.

Pricing & Payment

Include fees, invoicing cadence, payment terms, any usage-based pricing, and responsibility for taxes or third-party costs.

Service Levels

Set measurable SLAs (uptime, response times, remedies) and process for tracking, reporting, and remedying performance breaches.

Change Control

Describe how scope changes are requested, approved, documented, and priced to prevent informal verbal modifications.

Termination & Remedies

Outline termination rights, transition assistance, refund or credit mechanisms, and limitations of liability where applicable.

Step-by-step: completing the addendum

Work through the addendum in order to avoid missing dependent fields and ensure consistent cross-references to the master agreement.

01

1. Reference Agreement: Record master agreement name and date to tie obligations to the correct contract.
02

2. Define Scope: Describe deliverables, exclusions, and acceptance tests clearly.
03

3. Enter Commercial Terms: Fill fees, billing terms, and any one-time charges precisely.
04

4. Review & Sign: Confirm authorized signatories and obtain signatures in proper order.

How to set up an online completion workflow

Configure digital fields and routing to match the approval steps so signers receive correct prompts and records.

Field	Configuration
Effective Date	Set as required field with MM/DD/YYYY validation
Signature	Require signature + signer name and role fields
Approver Order	Configure sequential routing for signatory hierarchy
Notifications	Enable email reminders and completion receipts

Digital signing and e-submission considerations

Use an eSignature workflow that preserves an audit trail, enforces required fields, and supports the authentication level your transaction needs.

File formats: PDF and DOCX are preferred; ensure the platform preserves format and attachments
Authentication: Choose email+SMS or stronger authentication (KBA or SSO) depending on risk
Integrations: Connect to CRM or document storage to keep executed copies with the customer record

Confirm the selected eSignature solution supports retention, audit logs, and any regulatory obligations applicable to your industry.

Typical online execution flow for an addendum

A standard e-signature workflow reduces turnaround by automating routing and capturing an immutable completion record.

Upload document: Sender uploads the addendum to the signing platform
Place fields: Add signature, date, and required data fields
Assign signers: Enter signer emails and set signing order
Complete signing: Signers authenticate, sign, and receive executed copies

Timing and deadlines to track for addendum processing

Track effective dates, billing start dates, acceptance test windows, and any notice periods triggered by changes or termination.

Effective Date:

MM/DD/YYYY — governs when obligations commence

Billing Start:

Date fees begin and first invoice period

Acceptance Window:

Number of days allotted for acceptance testing

Notice Periods:

Time required for termination or change notices

Renewal Deadline:

Date by which renewal notices must be given

Key milestones from negotiation to live service

Use a sequential milestone view to coordinate internal approvals, operational handoffs, and go-live activities.

01

Negotiation Complete

Finalize terms and obtain internal approvals before executing.

02

Signature Execution

Collect signatures from all authorized parties and capture audit trail.

03

Operational Handoff

Deliver scope, access, and onboarding documentation to delivery teams.

04

Service Start

Begin billing and support per the addendum schedule.

Common mistakes when preparing a Product Service Addendum

Failing to reference the correct master agreement date, causing ambiguity over governing terms.
Using vague scope language that creates disputes about deliverables or acceptance criteria.
Omitting transition or exit assistance obligations, complicating contract termination.
Leaving pricing formulas unspecified, which can delay invoicing and reconciliation.

Consequences of errors or omissions

Contract Disputes: Ambiguous terms increase litigation or arbitration risk and associated costs.

Billing Delays: Incorrect fee language can postpone payments and strain cash flow.

Service Interruptions: Missing SLAs or acceptance steps can delay service start or support.

Regulatory Noncompliance: Improper handling of protected data can breach HIPAA, triggering penalties.

Invalid Signatures: Incorrect signer authority or missing disclosures can affect enforceability.

Recordkeeping Failures: Insufficient retention can impede audits and regulatory responses.

How a Product Service Addendum differs from similar documents

Compare the addendum against related contract attachments to choose the right instrument for documenting terms.

Document	Product Service Addendum	Statement of Work
Purpose	amend master terms	describe work scope
Timing	during contract lifecycle	pre-engagement or start
Level of detail	supplementary contract terms	execution-level tasks
Signatures required

Typical eSignature vendor pricing and capability comparison

A concise vendor comparison focuses on starting price, trial availability, bulk-send capabilities, audit trail, HIPAA support, and envelope or session caps.

	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	Yes	Yes	Yes	Varies by plan
Audit Trail	Yes	Yes	Yes	Yes	Yes
HIPAA Compliant	Yes	Yes	Yes	No	No
Envelope Cap	No cap	100 envelopes/user/year	Varies by plan	Varies by plan	Varies by plan

Security and compliance points to document

In transit: TLS 1.2/1.3 encryption

At rest: AES-256 encryption

Standards: SOC 2 Type II

Regulatory: ESIGN and UETA

Healthcare: HIPAA (BAA required)

Audit: Comprehensive audit trail

Practical tips for accurate and efficient completion

Adopt a review checklist and build mandatory fields into your workflow to reduce rework and ensure enforceability.

Reference Master Contract

Always include the master agreement name and execution date to clearly link the addendum to the governing contract.

Use Defined Terms

Reuse defined terms from the master agreement to avoid inconsistent meanings and interpretation disputes.

Require Key Fields

Make effective date, pricing, and signature blocks mandatory in the digital form to prevent incomplete executions.

Preserve Records

Store executed addenda with the customer record in secure, access-controlled storage and keep an immutable audit trail.

Real-world examples of Product Service Addenda

Two brief scenarios show typical uses of an addendum and expected outcomes.

Case Study 1

A software vendor amended support hours for a specific client to include 24/7 coverage during go-live

The addendum defined hourly rates, escalation paths, and a 30-day acceptance testing window
The result ensured clarity for billing and avoided service disputes during the critical implementation phase.

Case Study 2

A manufacturer added a shipping and installation clause for a large equipment order

The addendum specified delivery milestones, installation responsibilities, and liquidated damages for delays
This prevented confusion between product delivery obligations in the master purchase order and the service obligations performed onsite.

Typical signatories and their roles

Vendor Authorized Signatory

A senior operations or commercial leader who has delegated signature authority and can bind the vendor for the listed products and services; verify signature authority limits in corporate bylaws or delegation memoranda.

Customer Contracting Officer

A procurement or legal representative authorized to accept contractual amendments on behalf of the purchasing organization; ensure the signer's title and authority are recorded with the executed addendum.

Frequently asked questions about Product Service Addenda

Answers to common legal, execution, and recordkeeping questions when preparing or signing an addendum.

Need help? Contact support

Can an addendum be e-signed?
Yes. Electronic signatures are generally enforceable under the ESIGN Act (15 U.S.C. ch. 96) and UETA in most states, provided intent, consent, attribution, and reliable record retention are present.
Is notarization required?
Not typically for a Product Service Addendum. Notarization or witnesses are only needed when state law or a specific title, real estate, or statutory requirement applies.
What if signer names do not match IDs?
Mismatched names can create enforceability questions. Ensure legal entity names and signer names match corporate records or provide an officer certificate confirming authority.
How long must I keep executed addenda?
Retain executed addenda for the contract term plus recommended post-termination periods (commonly 3–7 years); follow IRS and HIPAA retention where applicable.
Are click-to-sign checkboxes valid?
Yes if they demonstrate intent, consent, and attribution and are captured in an audit trail; consumer-facing transactions may require ESIGN consumer disclosures.
What happens if a required field is left blank?
Missing pricing or signature fields can render an addendum unenforceable or cause processing delays; validate required fields before distributing for signature.

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