Can this be signed electronically?

Yes. Electronic signatures are legally valid under the ESIGN Act (15 U.S.C. ch. 96, 2000) and UETA in most states; ensure intent, consent, attribution, and retrievability are documented.

When is notarization required?

Notarization is rarely required for simple billing units but may be mandated for amendments affecting title or statutory filings; check the governing agreement and state law.

What if the signer’s name mismatches?

A name mismatch can delay processing and may require re-execution. Use the full legal name as on ID or contract; attach proof of authority when names differ.

Are witness signatures needed?

Witness requirements vary by state and document type. Most commercial Additional Service Units do not need witnesses, but real estate or power-of-attorney related changes may.

How should I store the executed unit?

Retain a tamper-evident electronic copy plus metadata and audit trail. Keep records according to retention rules applicable to your industry and federal requirements.

What if a party refuses to sign?

Document the refusal, notify contracting parties, and follow dispute resolution clauses in the master agreement; do not process billing until acceptance or an agreed remedy is documented.

Electronic Signature
Templates
Miscellaneous
Additional Service Unit

Additional Service Unit

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

ADDITIONAL SERVICE UNIT

This Additional Service Unit ("Addendum") is made effective as of and supplements the Master Services Agreement executed between the parties listed below.

WHEREAS

WHEREAS, Client Name: and Service Provider Name: are parties to a Master Services Agreement dated (the "Agreement");

WHEREAS, the parties desire to add the additional service unit described below and to set forth the terms, payment, and duration applicable to that unit.

ADDITIONAL UNIT DETAILS

Unit Identifier Unit Location Unit Description

Quantity

Unit Rate (per unit)

Total Amount

SCOPE OF WORK

The Service Provider shall perform the services for the additional unit as set forth below and in accordance with the standards of care and performance described in the Agreement.

Detailed Scope of Work

PAYMENT TERMS

Client shall pay Service Provider for the Additional Service Unit as follows. All amounts are in U.S. dollars unless otherwise specified.

Amount Due for Additional Unit Payment Schedule / Milestones

Late payments shall incur interest and fees as set forth below.

Late Fee

TERM AND TERMINATION

The term applicable to this Additional Service Unit shall commence and terminate as follows, subject to earlier termination in accordance with the Agreement.

Start Date

End Date

Notice Period for Termination (days)

CONFIDENTIALITY

Each party acknowledges that, in connection with the performance under this Addendum, it may receive Confidential Information of the other party. "Confidential Information" means non-public information disclosed in any form that is identified as confidential or that reasonably should be understood to be confidential. Each party shall: (a) use Confidential Information solely for performance under this Addendum; (b) restrict disclosure to employees, agents, or subcontractors with a need to know and subject to confidentiality obligations at least as protective as those herein; and (c) exercise at least the same degree of care to protect Confidential Information as it uses to protect its own confidential information, but in no event less than reasonable care. Confidentiality obligations survive termination for a period of three (3) years, except for trade secrets which shall remain protected for as long as they qualify as trade secrets.

GOVERNING LAW; DISPUTE RESOLUTION

This Addendum shall be governed by and construed in accordance with the laws of the State of without regard to its conflict of law principles. Any dispute arising out of or relating to this Addendum shall be resolved in the manner specified in the Agreement; if the Agreement is silent, the parties agree to submit to the exclusive jurisdiction of the state and federal courts located in the governing state specified above.

ENTIRE AGREEMENT

This Addendum, together with the Agreement, constitutes the entire understanding between the parties with respect to the subject matter hereof and supersedes all prior and contemporaneous agreements, proposals, and communications, whether oral or written, regarding the Additional Service Unit. Except as expressly modified by this Addendum, all terms and provisions of the Agreement remain in full force and effect.

MISCELLANEOUS PROVISIONS

No amendment to this Addendum will be effective except in a written instrument signed by authorized representatives of both parties. If any provision of this Addendum is held to be invalid or unenforceable, the remaining provisions shall remain in full force and effect. The parties agree that monetary damages may be inadequate to remedy a breach of confidentiality obligations and that equitable relief may be appropriate.

ACKNOWLEDGEMENT

The undersigned represent and warrant that they are authorized to enter into this Addendum on behalf of the party for which they sign.

Client Name:

By:

Date:

Service Provider Name:

By:

Date:

What an Additional Service Unit Is and when it’s used

An Additional Service Unit is a supplemental service line item or authorization used to record, price, and approve work, services, or deliverables added to an existing agreement or invoice. It documents scope, quantity, unit rate, and effective dates for the added service and creates an auditable record for billing, acceptance, and dispute resolution. The form is commonly attached to master service agreements, purchase orders, change orders, or invoices to ensure all parties agree to the new work and associated charges before execution.

Why a clear Additional Service Unit matters

A well‑completed Additional Service Unit reduces billing disputes, clarifies scope, and provides a concise record for accounting and compliance. It supports contract enforcement by documenting intent, consideration, and signatures tied to the additional work.

Who prepares and who signs an Additional Service Unit

Typical preparers include project managers, accounts payable/receivable teams, and contract administrators who need to record changes to scope and cost.

Project Managers and PMOs — create and attach units to change orders and schedules for approval and billing.
Finance and Billing Teams — validate rates, apply correct GL codes, and route for invoice consolidation.
Contract Administrators and Legal — confirm compliance with master agreements and signatory authority before execution.

Use the signer guidance and authorization rules in this guide to confirm who is authorized to approve and sign the Additional Service Unit.

Core sections a professional Additional Service Unit should include

A complete Additional Service Unit groups administrative, commercial, and acceptance information to ensure clarity. Include identifiers, pricing, effective dates, acceptance criteria, signatories, and attachments.

Identifier

Unique unit or amendment number linking the additional service to the master contract and accounting records for traceability.

Description

Concise scope description of the additional work, tasks, or deliverables so reviewers can confirm exactly what is being added.

Quantity/Rate

Unit of measure, quantity, and unit price or rate. Specify hours, days, each, or fixed price and any applicable taxes.

Effective Dates

Start and end dates or milestone triggers that determine when the service begins, billing periods, and any proration rules.

Acceptance

Objective acceptance criteria or deliverable inspection process that defines when the unit is considered complete and billable.

Signatures

Authorized signers, dates, and witness/notary details where required to validate approval and payment authorization.

Required fields to complete on the Additional Service Unit

Service Unit ID: Unique reference code

Customer Name: Full legal entity

Description: Short scope summary

Quantity & Unit: Numeric count and unit

Unit Price: Dollar amount per unit

Authorized Signer: Name and title

Step-by-step: completing and routing an Additional Service Unit

Follow this sequence to prepare, approve, sign, and record the Additional Service Unit in corporate systems.

01

Prepare: Populate all required fields and attach supporting documents.
02

Validate: Finance and contracts verify pricing, budget, and authority.
03

Authorize: Obtain signatures in the order required by the master agreement.
04

Record: Store completed unit in contract repository and update accounting records.

Configuring a digital workflow for Additional Service Units

Use these settings when creating an online workflow to ensure consistent validation, approval order, and retention.

Field	Configuration
Signature Authentication	Email link with optional SMS code
Field Validation	Required fields and numeric formats enforced
Auto-fill	Populate customer and contract data from CRM
Routing Order	Sequential approvals with conditional branching

Where to send the completed Additional Service Unit

Route the finished unit to the parties and systems that must accept, authorize, and record the change.

Client or Counterparty: Send for signature and acceptance
Contracts Team: Review for compliance with master agreement
Finance / Billing: Approve for invoicing and GL allocation
Document Repository: Archive with contract and invoice files

Distribution and eSubmission options

Additional Service Units can be shared by email, secure signing links, or submitted directly into contract and accounting systems via integrations.

Email and Links: Send secure signing links to parties
API Integrations: Connect to CRM and ERP systems
Cloud Storage: Save to Box, Google Drive, or NetSuite

Choose the method that preserves an audit trail and integrates with your recordkeeping systems; prefer methods that include signer authentication and tamper-evident outputs.

Typical timelines and processing expectations

Processing times vary by organization and approval routing. Use these common targets to set expectations internally and with clients.

Preparation Time:

Complete form before submitting for approval; usually same business day

Contract Review:

Allow 1–3 business days for contracts to confirm authority

Client Signing:

Expect return within 1–5 business days via eSignature

Finance Approval:

Allow 1–3 business days for billing validation

Recording and Billing:

Invoice inclusion next billing cycle after approvals

Common mistakes to avoid when preparing the unit

Leaving identification fields blank or using inconsistent IDs that prevent matching to the master contract and invoices.
Using vague descriptions like 'additional work' without objective deliverables, which leads to disputes over scope and payment.
Failing to confirm signer authority, causing accepted units to be void or requiring re-execution.
Omitting effective dates or billing rules, which can create pro rata calculation errors and delayed invoices.

Risks and potential penalties from errors

Contract Invalidity: Missing signature may void amendment

Tax Withholding: Incorrect TIN can trigger 24% backup withholding

Invoice Rejection: Incomplete units delay payment

Regulatory Exposure: HIPAA breach if PHI mishandled

Audit Findings: Poor records increase audit risk

Dispute Costs: Legal fees and remediation costs

Comparing eSignature providers for signing Additional Service Units

This table lists common vendor plan characteristics relevant to executing and storing executed Additional Service Units; signNow is shown 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	Varies	Varies	Varies
Bulk Send	Yes	Yes	Yes	Yes	No
Audit Trail	Yes	Yes	Yes	Yes	Yes
HIPAA Compliant	Yes	Yes	Yes	No	No

Frequently asked questions about Additional Service Units

Answers below address common execution, signature, and retention questions for Additional Service Units used in U.S. transactions.

Need help? Contact support

Can this be signed electronically?
Yes. Electronic signatures are legally valid under the ESIGN Act (15 U.S.C. ch. 96, 2000) and UETA in most states; ensure intent, consent, attribution, and retrievability are documented.
When is notarization required?
Notarization is rarely required for simple billing units but may be mandated for amendments affecting title or statutory filings; check the governing agreement and state law.
What if the signer’s name mismatches?
A name mismatch can delay processing and may require re-execution. Use the full legal name as on ID or contract; attach proof of authority when names differ.
Are witness signatures needed?
Witness requirements vary by state and document type. Most commercial Additional Service Units do not need witnesses, but real estate or power-of-attorney related changes may.
How should I store the executed unit?
Retain a tamper-evident electronic copy plus metadata and audit trail. Keep records according to retention rules applicable to your industry and federal requirements.
What if a party refuses to sign?
Document the refusal, notify contracting parties, and follow dispute resolution clauses in the master agreement; do not process billing until acceptance or an agreed remedy is documented.

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