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Verification & Assurance

Independent limited and reasonable assurance across sustainability claims.

GHG ProtocolISAE 3000ISAE 3410
assurance.os · engagement #A-2841
GHG Protocol
Verification pipeline
2/5 verified
Intake
Evidence
Controls
Review
Assured
Utility bills · Q3
ERP · fuel logs
Meter · Site A
Supplier attestations
Travel policy v4
Independent opinion
Reasonable assurance · unqualified
Controls · GHG Protocol
LIVE
Boundary checktested
Scope 1/2/3 completenesstested
Emission factor lineagetested
Sample coverage92%
Reviewer sign-off
Approved
FZ
Dr Farida Zaman
Lead assurance partner
Overview

Assurance you can defend. Independent verification aligned to ISAE 3000/3410 and ISO 14064-3, with working papers built for regulator and investor scrutiny.

Independent, standards-aligned assurance
Regulator-defensible working papers
Findings that improve, not embarrass
The signature

Evidence → Testing → Review → Assurance Opinion.

Hover any evidence source to trace how raw data is collected, tested against controls, reviewed, and released as an independent assurance opinion.

VERIFIEDEvidence RepositoryIDLECarbon InventoryUtility BillsERP DataSupplier RecordsSite InspectionsInterviewsMeter ReadingsPoliciesCompletenessAccuracyCut-offExistenceValuationINDEPENDENTAssurance OpinionScope · GHG assertionStandard · ISAE 3410Level · ReasonableResult · Unqualified
EvidenceControlsOpinion
The journey
Discover
Measure
Validate
Transform
Methodology

An interactive, auditable path.

01
Scoping

Assertion, criteria, and materiality thresholds.

02
Risk

Inherent and control-risk assessment.

03
Evidence

Substantive and analytical procedures with sampling.

04
Opinion

Limited or reasonable assurance statement.

Frameworks covered

Standards we speak fluently.

ISA
ISAE 3000
ISA
ISAE 3410
ISO
ISO 14064-3
ISO
ISO 14065
AA1
AA1000AS
Deliverables

What you actually receive.

Assurance statement
PDF · Working file
Working papers file
PDF · Working file
Findings register
PDF · Working file
Improvement roadmap
PDF · Working file
Engagement roadmap

How the work unfolds.

Weeks 1–2

Scoping and materiality.

Weeks 3–6

Fieldwork and evidence review.

Weeks 7–8

Reporting and clearance.

Client outcomes

Signals of the work.

0+
Verifications delivered
0/10
Repeat clients
0%
Investor-grade
Industries served

Where we work

Listed corporates
Sovereigns
Real estate
Energy
Financial services
FAQ

Common questions.

We help you choose based on stakeholder expectations and regulatory horizon.

Ready to move?

Let's design your verification & assurance program.

A 45-minute working session to understand your context and shape the fastest credible path forward.