Can an addendum be signed electronically?

Yes. Electronic signatures are generally enforceable under the federal ESIGN Act (15 U.S.C. §7001) and state UETA laws; ensure intent, consent, attribution, and retention are documented to meet the ESIGN four‑prong validity test.

When is notarization required?

Most subscription addenda do not require notarization. If a state law or specific transaction type requires acknowledgement or notary authentication, follow that jurisdiction’s rules and consider RON where permitted.

Who must sign the addendum?

An authorized representative with authority to bind the organization should sign. Include title and authority statement; confirm signatory power in internal delegation documents to prevent later challenges.

How do I amend the addendum later?

Create a subsequent signed addendum referencing prior amendments, or execute a consolidated amendment. Maintain version control and distribute copies to all parties to avoid conflicting records.

How long should I keep executed addenda?

Follow minimum federal and industry retention periods: at least 3 years for tax documents (IRC §6501(a)), 6 years for HIPAA‑regulated records (45 CFR §164.530(j)), and longer where state law requires.

What if parties disagree about the change?

Preserve all drafts and communications. A clear executed addendum reduces dispute risk; absent agreement, revert to original contract terms and follow dispute resolution clauses.

Electronic Signature
Templates
Legal
Subscription Services Agreement Addendum

Subscription Services Agreement Addendum

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SUBSCRIPTION SERVICES AGREEMENT ADDENDUM

This Subscription Services Agreement Addendum (this Addendum) is made as of by and between Client Name: with principal address: and Service Provider Name: with principal address: .

RECITALS

WHEREAS, the parties executed a Subscription Services Agreement identified as the Agreement dated (the Agreement); and

WHEREAS, the parties desire to amend certain terms of the Agreement to reflect changes to subscription services, fees, term and support obligations as set forth herein; and

WHEREAS, except as expressly amended by this Addendum, the Agreement remains in full force and effect.

NOW, THEREFORE

In consideration of the mutual covenants contained herein, the parties agree as follows:

1. DEFINITIONS

Capitalized terms used but not defined in this Addendum have the meanings assigned in the Agreement. For the purposes of this Addendum, the following definitions apply:

1.1 "Addendum Effective Date" means the date set forth above in the introductory paragraph. Additional effective dates for specific changes, if any, are set forth in Section 2.

2. SCOPE OF AMENDMENTS

2.1 The Agreement is amended to include the following changes to subscription services and deliverables. New or modified services shall be provided by Provider in accordance with the terms of the Agreement and this Addendum.

Additional or Modified Services (describe)

2.2 Service Level Modifications: The parties agree that the service levels set forth in the Agreement are hereby modified unchanged. If modified, specify material changes below.

Service Level Changes (if any)

3. FEES, BILLING AND PAYMENT

3.1 Subscription Fee Adjustments. As of the Addendum Effective Date or the date specified below, Client will pay Provider the fees set forth in this Section. Any fee increases shall be applied only as expressly set forth in this Addendum.

New Monthly Subscription Fee One-Time or Setup Fee (if applicable)

3.2 Billing and Payment Terms. Provider will invoice Client in accordance with the Agreement. Invoices for subscription fees shall be payable within days from invoice date. Late payments shall accrue interest at the lesser of 1.5% per month or the maximum permitted by law.

4. TERM AND TERMINATION

4.1 Term. The term of the Agreement is amended as follows: The Agreement shall continue for a period of months from the Addendum Effective Date, and shall thereafter automatically renew not automatically renew.

4.2 Termination for Convenience. Either party may terminate the Agreement as amended by providing the other party with no less than days' prior written notice.

5. DATA; SECURITY; CONFIDENTIALITY

5.1 Data Processing. Provider shall process Client Data in accordance with the Agreement. Provider shall maintain administrative, physical and technical safeguards appropriate to the sensitivity of Client Data, including measures to protect against unauthorized access, disclosure, alteration or destruction.

5.2 Confidentiality. Each party reaffirms the confidentiality obligations contained in the Agreement. Confidential Information shall continue to be subject to non-disclosure and non-use obligations for the period specified in the Agreement.

6. INTELLECTUAL PROPERTY

6.1 Ownership. Except as expressly provided herein, the parties' respective ownership rights in Pre-Existing Materials and Improvements remain unchanged. Provider retains all right, title and interest in and to the Service and Provider Technology. Client retains ownership of Client Data.

6.2 License Grants. To the extent the Addendum contemplates new deliverables, Provider grants Client a non-exclusive, non-transferable license to use such deliverables in accordance with the Agreement.

7. REPRESENTATIONS, WARRANTIES AND DISCLAIMER

7.1 Each party represents that it has full power and authority to enter into this Addendum and to perform its obligations hereunder. Provider represents that the services to be provided under this Addendum will be performed in a professional and workmanlike manner in accordance with industry standards.

7.2 EXCEPT AS EXPRESSLY SET FORTH IN THIS ADDENDUM OR THE AGREEMENT, PROVIDER MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

8. INDEMNIFICATION; LIMITATION OF LIABILITY

8.1 Indemnification. Each party shall indemnify, defend and hold the other harmless from third-party claims arising from its breach of this Addendum or the Agreement, its negligence, or willful misconduct, subject to the limitations and procedures set forth in the Agreement.

8.2 Limitation of Liability. The parties agree that the limitation of liability provisions in the Agreement shall continue to apply to liabilities arising under this Addendum, except as may be otherwise provided in a written amendment signed by both parties.

9. NOTICES

All notices required or permitted under this Addendum shall be given in accordance with the Agreement. The parties designate the following contact information for notices related to this Addendum:

Client Notice Contact Provider Notice Contact

10. AMENDMENTS; WAIVER; COUNTERPARTS

10.1 Amendments. Except as expressly set forth in this Addendum, no amendment to the Agreement shall be effective unless in writing and signed by authorized representatives of both parties.

10.2 Waiver. No failure or delay by either party in exercising any right under this Addendum shall operate as a waiver of that right. A waiver must be in writing and signed by the waiving party.

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

11. GOVERNING LAW; ENTIRE AGREEMENT; SEVERABILITY

11.1 Governing Law. This Addendum shall be governed by and construed in accordance with the laws of the State of without regard to its conflict of laws principles.

11.2 Entire Agreement. This Addendum, together with the Agreement, constitutes the entire agreement between the parties with respect to the subject matter hereof and supersedes all prior and contemporaneous understandings, proposals and agreements, whether written or oral, relating to the same subject matter.

11.3 Severability. If any provision of this Addendum is held invalid or unenforceable, the remaining provisions shall continue in full force and effect to the fullest extent permitted by law.

12. MISCELLANEOUS

12.1 Remedies. Except as otherwise expressly provided in this Addendum, the parties' rights and remedies are cumulative and in addition to any other rights or remedies available at law or in equity.

12.2 Survival. All provisions of the Agreement that by their nature survive termination or expiration of the Agreement shall survive such termination or expiration as amended by this Addendum.

Client:

By:

Date:

Provider:

By:

Date:

What the Subscription Services Agreement Addendum Is

A Subscription Services Agreement Addendum is a short written amendment appended to an existing subscription services agreement that records changes to scope, billing, term, service levels, or other material contract terms. It clarifies which original provisions remain in effect, specifies the effective date of changes, and creates an auditable record of mutual consent where parties agree to update pricing, add or remove modules, or modify termination and renewal mechanics without redrafting the main agreement.

Why an Addendum Matters for Ongoing Subscriptions

Using a clear, signed addendum preserves the original contract while documenting specific changes, reducing ambiguity and litigation risk.

Who Typically Prepares or Signs This Addendum

Parties should confirm signatory authority and routing before executing to avoid enforceability issues and processing delays.

Contract managers and in-house counsel who maintain master agreements and approve scope or legal changes for recurring services.
Finance and billing teams that need signed authorization to update pricing, payment methods, or invoicing schedules.
Customer success or account teams that coordinate technical changes, feature access, or service-level adjustments on behalf of customers.

Essential Components to Include in a Professional Addendum

A well-drafted addendum is concise but complete: it identifies the base agreement, lists precise changes, sets an effective date, and includes signatures and authority statements.

Reference the Base Agreement

Identify the original subscription agreement by title, execution date, and any amendment history so the addendum clearly attaches to the correct master contract and avoids confusion about which terms persist.

Describe the Change Precisely

State the exact clause(s) being modified with quoted text or redline language and provide the new wording to prevent differing interpretations and to support audits or dispute resolution.

Effective Date and Term

Specify the effective date for the change and whether the change affects the overall contract term, renewal schedule, or creates a separate limited-duration obligation.

Pricing and Billing Adjustments

Clearly state price changes, billing start dates, pro rata calculations, any credits or refunds, and whether taxes or fees are impacted by the modification.

Service Levels and Deliverables

If changing SLAs, feature access, or deliverables, include measurable metrics, reporting cadence, and any remedies or credits tied to nonperformance.

Signatures and Authority

Include printed names, titles, company names, signature blocks, and a statement that signatories have authority to bind their organizations to eliminate later challenges to enforceability.

Required Data Elements for Accuracy and Compliance

Parties Identified: Full legal names

Agreement Date: MM/DD/YYYY effective date

Amended Clauses: Specific clause identifiers

Monetary Terms: Exact amounts and billing terms

Signature Details: Name, title, and date

Document Reference: Base agreement title and version

Step-by-Step: Completing the Addendum

Follow these steps in order to prepare a clear, enforceable addendum and to minimize internal review cycles.

01

Identify the base contract: Confirm title, date, and version number.
02

Draft precise language: Replace or append clause text verbatim.
03

Obtain internal approvals: Route to legal, finance, and account owner.
04

Execute and distribute: Sign, date, and send copies to all parties.

How to Configure a Digital Workflow for This Addendum

Set up a predictable, auditable routing workflow to collect signatures and retain the executed addendum centrally.

Field name and configuration details	Use required signature, date, and text fields.
Signature field placement and validation	Place one signature per party and require signer name validation.
Date field format enforcement	Require MM/DD/YYYY and populate default today option.
Conditional approval routing	Route to finance if pricing changed, legal if terms altered.
Audit and storage settings	Enable complete audit trail and archive PDF copy.

Typical eSigning Flow for a Subscription Addendum

A standard electronic workflow reduces turnaround time and preserves a forensic audit trail for the amendment.

Upload document: Sender uploads the addendum PDF or DOCX.
Place fields: Add signature, date, and initials fields as required.
Add signers: Enter signer emails and set signing order.
Complete signing: Signers authenticate, sign, and receive completed copies.

Technical and Integration Considerations for eDelivery

Confirm the platform meets any industry compliance needs and that completed records are archived in your document management system.

Authentication options: Email, SMS code, or advanced options.
Integration connectivity: Salesforce, NetSuite, Google Workspace supported.
File formats: PDF and DOCX accepted and preserved.

Common Timeframes and Notice Periods to Observe

Know and document key dates—effective date, billing changes, notice windows, and renewal triggers—to prevent disputes and billing gaps.

Effective date specification:

Set the exact MM/DD/YYYY when changes apply.

Invoice or billing start:

State the first billing cycle affected by change.

Customer notice period:

Provide any required written notice window, often 30 days.

Renewal or termination notice:

Specify required advance notice, typically 30–60 days.

Record retention timing:

Retain executed addendum per your document retention policy.

Common Risks and Potential Consequences of Mistakes

Tax reporting penalties: Incorrect vendor identification

Employment-related fines: I-9 or payroll mismatches

Contract disputes: Ambiguous change language

HIPAA exposure: Unauthorized PHI disclosure

Notarization defects: Missing acknowledgment where required

Data breach fines: Insufficient security controls

eSignature Pricing and Feature Comparison Relevant to Executing Addenda

Compare starting prices and core capabilities that affect high-volume addendum execution and auditability; signNow appears first for parity in vendor comparison.

	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, no credit card required	Varies by plan and promotion	Varies by plan and promotion	Varies by plan and promotion	Varies by plan and promotion
Bulk Send	Available on select plans	Available on select plans	Available on select plans	Available on select plans	Limited availability
Audit Trail	Yes	Yes	Yes	Yes	Yes
HIPAA Compliant	Yes	Yes	Yes	No	No

Frequently Asked Questions About Executing a Subscription Addendum

Answers to common questions about e‑signature validity, notarization, signatory authority, amendments, and recordkeeping for subscription addenda.

Need help? Contact support

Can an addendum be signed electronically?
Yes. Electronic signatures are generally enforceable under the federal ESIGN Act (15 U.S.C. §7001) and state UETA laws; ensure intent, consent, attribution, and retention are documented to meet the ESIGN four‑prong validity test.
When is notarization required?
Most subscription addenda do not require notarization. If a state law or specific transaction type requires acknowledgement or notary authentication, follow that jurisdiction’s rules and consider RON where permitted.
Who must sign the addendum?
An authorized representative with authority to bind the organization should sign. Include title and authority statement; confirm signatory power in internal delegation documents to prevent later challenges.
How do I amend the addendum later?
Create a subsequent signed addendum referencing prior amendments, or execute a consolidated amendment. Maintain version control and distribute copies to all parties to avoid conflicting records.
How long should I keep executed addenda?
Follow minimum federal and industry retention periods: at least 3 years for tax documents (IRC §6501(a)), 6 years for HIPAA‑regulated records (45 CFR §164.530(j)), and longer where state law requires.
What if parties disagree about the change?
Preserve all drafts and communications. A clear executed addendum reduces dispute risk; absent agreement, revert to original contract terms and follow dispute resolution clauses.

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