What is the difference between limited and reasonable assurance?

Reasonable assurance requires deeper testing and gives a positive opinion; limited assurance is a negative-form conclusion.

Accredited verification bodies independent from the consultancy that prepared the data.

How long does verification take?

Typically 4–8 weeks after data submission.

Is verification mandatory?

Yes for MRV, CBAM and certain TSRS disclosures; voluntary otherwise but often demanded by customers.

What causes findings?

Missing evidence, inconsistent boundaries and undocumented emission factors.

Expert Consultancy Service

Verification Services

Independent verification preparation for greenhouse gas inventories, product and water footprints, energy management and sustainability reports.

Free Pre-assessment +90 216 573 64 04

Verification gives your reported data credibility with regulators, customers and investors. We prepare the inventory, evidence and controls so an accredited verifier can issue a reasonable or limited assurance statement.

Greenhouse gas verification

ISO 14064-1 corporate inventories and ISO 14064-3 verification preparation, including the Turkish MRV regulation.

Product and water footprints

ISO 14067 product carbon footprint and ISO 14046 water footprint verification support.

Reporting assurance

Limited assurance readiness for TSRS, GRI and CSRD-aligned sustainability reports.

Evidence management

Traceable data trails, calculation workbooks and control documentation to close verifier findings quickly.

How we work

1Gap analysis: current status, legal obligations and data maturity are assessed.
2Work plan: scope, boundaries, responsibilities and timetable are agreed.
3Implementation: procedures, calculations and evidence files are produced.
4Internal review: data quality checks and management review are completed.
5Audit / submission: the accredited body audit or official application is managed.
6Continuous improvement: annual surveillance, updates and target tracking.