By Dr Souha Bel Haj Messaoud | Founder, Eco Fluent Solutions Updated: August 2026 | Reading time: 12 min
Almost every Validation and Verification Body (VVB) has an impartiality policy. Most have a statement in their quality manual affirming their commitment to independence and objectivity. Some have a dedicated procedure.
Very few have a functioning impartiality system.
This distinction, between having a policy and having a system, is exactly what accreditation assessors are trained to identify. And it is the single most common area where VVBs receive major non-conformities during their first accreditation assessment.
ISO 17029 dedicates Clause 5 to impartiality. It is not the longest clause in the standard, but it is arguably the most consequential. Fail here, and no amount of well-written procedures elsewhere in your system will compensate.
This article explains what ISO 17029 actually requires on impartiality, what assessors examine during an accreditation visit, and what a properly documented impartiality system looks like in practice.
What Does Impartiality Mean Under ISO 17029?
Impartiality, as defined in ISO 17029, means that validation and verification activities are conducted objectively, free from bias, conflict of interest, and undue influence. It applies at two levels: the organisation as a whole, and the individuals performing validation and verification activities.
This is not simply about intentions. ISO 17029 does not ask VVBs to declare that they intend to be impartial. It requires that they have documented systems to identify, assess, and manage any threat to impartiality, before, during, and after each engagement.
The standard distinguishes between:
- Structural impartiality : how your organisation is designed to prevent conflicts of interest from occurring
- Operational impartiality : how you identify and manage threats on a case-by-case basis in practice
Both are required. A well-designed structure that is never applied operationally does not satisfy the standard. And sound operational practices that exist only informally, without documented procedures, will not withstand an accreditation assessment.
The Two Levels of Impartiality ISO 17029 Requires
Structural Impartiality
Structural impartiality is about the design of your organisation. ISO 17029 requires that the structure of your VVB prevents situations where commercial, financial, or personal interests could compromise the objectivity of your validation and verification activities.
This means:
- Clear separation between your validation/verification function and any advisory or consulting activities, a VVB cannot provide consulting to a client on the same subject matter it is then asked to validate or verify
- An impartiality committee or equivalent governance body with the authority to oversee impartiality safeguards and intervene when threats are identified
- Governance arrangements that protect the independence of validation and verification decisions from commercial pressures within the organisation
Structural impartiality must be documented. It is not sufficient to describe your structure verbally during an assessment visit, assessors expect to find it in your quality manual, your organisational chart, and your governance documentation.
Operational Impartiality
Operational impartiality is about what you do before and during each engagement. ISO 17029 requires a systematic process to:
- Screen each proposed engagement for potential threats to impartiality
- Collect conflict of interest declarations from all personnel assigned to the engagement
- Assess whether identified threats can be managed or whether they require the engagement to be declined
- Document the outcome of this assessment and the decisions made
This process must be applied consistently, not selectively, not informally, and not only when a potential conflict is obvious. Assessors will ask to see records from past engagements to verify that the process was applied.
What Assessors Actually Check: The 6 Elements
When an accreditation body assesses your impartiality system, they examine six specific elements. Understanding these in advance is the most effective preparation you can do.
1. The Impartiality Policy
Assessors will read your impartiality policy, but they are not looking at the policy itself in isolation,they are looking for evidence that the policy is reflected in your procedures, records, and actual behavior.
A policy that states “we are committed to impartiality” without defining how threats are identified, assessed, and managed is insufficient. Your impartiality policy should describe the framework, reference the procedures that operationalize it, and be reviewed and approved at the appropriate governance level.
2. The Impartiality Committee
ISO 17029 requires a mechanism, typically an impartiality committee, that provides oversight of impartiality across your organisation. Assessors check whether this committee:
- Has a defined composition, including members with sufficient independence from commercial activities
- Has documented terms of reference describing its role, authority, and meeting frequency
- Meets regularly and produces records of its deliberations
- Has actually exercised its authority, for example, by reviewing a potential conflict, requiring additional safeguards, or declining an engagement
An impartiality committee that exists on paper but has never met, or that has met but left no records, is a finding.
3. Conflict of Interest Declarations
Every person involved in a validation or verification engagement ; validators, verifiers, technical reviewers, and decision makers, must complete a conflict of interest declaration before the engagement begins.
Assessors will check:
- That declarations exist for all relevant personnel on reviewed engagements
- That declarations cover the specific client, subject matter, and time period of the engagement
- That declarations were reviewed by an authorized person and a decision recorded
- That the process for handling a disclosed conflict is documented and was followed
A missing declaration for a single team member on a reviewed engagement is a minor non-conformity. A systematic absence of declarations is a major one.
4. Threat Identification and Management
ISO 17029 identifies categories of threats to impartiality that VVBs must screen for. Assessors expect your procedures to address each of these, and your records to show they were assessed on actual engagements:
- Self-interest threat : a financial or other personal interest that influences judgement (e.g., fees contingent on the outcome of verification)
- Self-review threat : reviewing your own work or the work of your organisation (e.g., verifying a GHG declaration based on a methodology you helped develop for the same client)
- Familiarity threat : excessive familiarity with a client that may lead to accepting their assertions without sufficient scrutiny
- Intimidation threat : actual or perceived pressure from a client to reach a particular conclusion
- Advocacy threat : acting as an advocate for a client’s position rather than maintaining independent judgement
Your procedures must define how each type of threat is identified and what actions are available to manage or eliminate it.
5. Separation of Critical Functions
The person who performs the validation or verification work must not be the same person who independently reviews it, and neither of them should be the person who makes the final decision to issue the validation or verification statement.
Assessors verify this separation in two ways: first by reviewing your documented procedures, and second by tracing it through actual engagement records, checking who performed the work, who reviewed it, and who signed the final statement.
For small VVBs, satisfying this requirement without creating unsustainable structures is a genuine design challenge. There are legitimate approaches to managing it but they must be documented and consistently applied.
6. Commercial Independence of the Verification Decision
Assessors pay close attention to whether commercial considerations could influence verification decisions. This includes reviewing whether:
- Fee structures are independent of verification outcomes
- Personnel responsible for verification decisions have no direct commercial targets linked to client retention
- There are documented safeguards preventing client relationship managers from influencing technical decisions
This is an area where the gap between stated policy and actual practice is most likely to be visible, particularly in smaller organisations where commercial and technical roles overlap.
The Most Common Impartiality Gaps Assessors Find in VVB Systems
Based on direct experience accompanying VVBs through accreditation preparation, these are the gaps that appear most consistently:
An impartiality committee that exists in name only. The committee is referenced in the quality manual, roles are assigned, but there are no meeting records, no documented decisions, and no evidence that it has ever reviewed a conflict of interest case. Assessors treat this as a major structural gap.
Conflict of interest declarations collected but not reviewed. Declarations are completed and filed, but there is no documented review by an authorised person and no record of the decision reached. Collecting a declaration without reviewing it does not satisfy the requirement.
Threat assessment performed informally. The engagement manager screens for conflicts mentally before assigning a team, but nothing is written down. Informal processes that leave no records do not exist from an accreditation perspective.
Self-review threat not addressed in procedures. Many VVBs fail to explicitly address situations where a team member has previously provided advice or consulting to a client on matters related to the subject of the verification. This is one of the most common real-world conflicts in the GHG domain and one of the least explicitly managed.
Impartiality policy not reviewed at management level. ISO 17029 requires that the commitment to impartiality be demonstrated at the leadership level. A policy that was written once and never reviewed or reaffirmed does not demonstrate ongoing commitment.
For the full picture of what assessors examine across your entire VVB system: [The Complete Guide to ISO 17029 Accreditation (2026 Edition)]
How to Document Your Impartiality System Correctly
A properly documented impartiality system consists of four interconnected elements:
The impartiality policy
a brief, clear statement of your commitment to impartiality, the framework you use to manage threats, and the governance mechanism that oversees it. Reviewed and approved at leadership level at least annually.
The impartiality procedure
a step-by-step description of how threats are identified, assessed, and managed at the engagement level. Should reference the forms used, the roles responsible, and the escalation path when a threat cannot be managed.
The impartiality committee terms of reference
describing composition, independence requirements for members, meeting frequency, decision-making authority, and documentation requirements.
Engagement-level records
for each validation or verification engagement: the conflict of interest declarations, the threat assessment, the decision reached, and any safeguards applied. These records are the operational proof that your system functions.
The four elements must be consistent with each other. An assessor reading your policy, then your procedure, then examining your engagement records should find the same system described coherently throughout, not three separate documents that do not reference each other.
Competence and impartiality are the two areas assessors examine most closely. For competence requirements: [ ISO 14066 Competence Requirements: A Practical Guide for VVB Teams]
Frequently Asked Questions About ISO 17029 Impartiality
Does every VVB need a formal impartiality committee?
ISO 17029 requires a mechanism to oversee impartiality, in most cases, this takes the form of a committee. For very small VVBs, alternative arrangements may be acceptable provided they genuinely provide independent oversight. What is not acceptable is having no governance mechanism at all. The specific structure should be defined in your quality manual and reviewed with your accreditation body during the application stage.
Can the same person be both a validator and a technical reviewer on different engagements?
Yes, a person can hold multiple qualified roles across different engagements. What ISO 17029 prohibits is the same individual acting as both the team performing the validation or verification work and the independent technical reviewer on the same engagement. The separation must be maintained within each individual engagement.
What happens when a conflict of interest is identified?
Your procedure must define the response options: reassigning the team member, implementing additional safeguards (e.g., enhanced technical review), or declining the engagement. The response must be proportionate to the severity of the threat. The decision and its rationale must be documented. There is no requirement to decline every engagement where a potential threat exists. The requirement is to manage threats systematically and document how.
How do we handle a situation where a team member previously worked for the client?
Prior employment relationships are a common source of familiarity and self-interest threats. Your procedure should define a minimum period after which such relationships are considered sufficiently distant and how closer relationships are managed. The key principle is that the decision must be deliberate, documented, and based on an assessment of the actual threat level, not a blanket rule applied without analysis.
Is impartiality still required if we only work in one narrow sector?
Yes. The scope of your accreditation does not reduce your impartiality obligations. In some ways, a narrow sector scope increases the risk of familiarity threats because the pool of potential clients and the community of technical experts is smaller. Your impartiality system must be designed with your actual operating environment in mind, not a theoretical one.
How often should the impartiality system be reviewed?
ISO 17029 requires that the commitment to impartiality is maintained on an ongoing basis. In practice, this means an annual management review of the impartiality policy and committee effectiveness, a review of conflict of interest patterns across engagements, and an update to procedures whenever a new type of threat is encountered. The impartiality committee should meet at least annually, and more frequently if your volume of engagements warrants it.
Is Your Impartiality System Accreditation-Ready?
Impartiality is the area where the gap between having a policy and having a system is most consequential and most visible to assessors.
At Eco Fluent Solutions, I work with VVBs to assess the structural and operational integrity of their impartiality systems against the requirements of ISO 17029 Clause 5, identifying gaps in governance, procedures, and records before they become findings in an accreditation assessment.
→ Request your accreditation readiness audit — a structured, independent review of your VVB system including your impartiality framework, delivered by a specialist with direct accreditation preparation experience.
Related articles:
- The Complete Guide to ISO 17029 Accreditation (2026 Edition)
- ISO 14066 Competence Requirements: A Practical Guide for VVB Teams
- ISO 17029: The Invisible Backbone of Trust — Why Accreditation Bodies Face Their Most Challenging Era?
- ISSA 5000 vs ISAE 3000: Which Assurance Standard Should VBs Choose for CSRD?
Dr Souha Bel Haj Messaoud is the founder of Eco Fluent Solutions, a Paris-based consultancy specializing in ISO management systems, sustainability governance, and VVB accreditation readiness. She has supported organisations across Europe, Asia, and North Africa in building accreditation-ready systems under ISO 17029, ISO 14065, and ISO 14066. Learn · Comply · Lead — ecofluentsolutions.com
