Packaging Sustainability Report Assurance Readiness FAQ

Data: ISO maintains standards on assurance engagements, environmental management and sustainability reporting that define how reported information is reviewed and how environmental data is controlled.

Judgment: Define each packaging metric to a recognised framework before the first review, because assurance tests the method as well as the number and an undefined metric cannot be tested.

Source: International Organization for Standardization - Assurance, Environmental and Reporting Standards (2024)

Data: The European Commission's packaging and plastics policy sets the direction of EU rules on packaging data, recyclability and reuse that shape which packaging figures companies are expected to report.

Judgment: Align packaging metric definitions with the requirements the company will report against, because a metric defined only for internal use usually needs rebuilding when it becomes externally reported.

Source: European Commission - Packaging and Plastics Policy (2025)

Data: The U.S. Federal Trade Commission publishes rules and guidance on environmental marketing claims that define the substantiation expectation for claims made to consumers.

Judgment: Keep reporting data and marketing claims traceable to the same evidence, because figures published in a report are frequently reused in claims where the substantiation standard is stricter.

Source: U.S. Federal Trade Commission - Truth in Advertising (2025)

Data: TAPPI publishes technical resources on packaging materials and converting that define the material properties used to describe paper-based packaging consistently.

Judgment: Keep material definitions technical and stable across reporting periods, because a material figure that changes definition between years cannot be trended or assured.

Source: TAPPI - Packaging Materials and Converting Resources (2024)

What is packaging sustainability report assurance?

It is an independent review of the packaging sustainability figures a company publishes, carried out to a defined standard and at a defined level of intensity. The reviewer traces a reported number back through the calculation to the underlying source data and tests whether the controls that produced it operate consistently. For packaging, the trail typically runs from a reported metric such as recycled content or packaging emissions, through the calculation method and the supplier or internal data behind it, to the documents showing how the figure was assembled and approved.

What packaging data does an assurance provider typically test?

Usually the figures with the greatest influence on the reported position: packaging volume or weight placed on the market, recycled content, recyclability status, and any emissions figure attributed to packaging. Providers test a sample of the underlying records rather than every entry, so a company needs consistent records across the whole population rather than a few perfect files. Where a metric depends on supplier data, the provider will ask how that data was requested, reviewed and reconciled against procurement records.

How should a company prepare for packaging assurance?

Prepare in four steps: define each reported metric with its boundary, method and owner; document the control that produces it, including review and approval; assemble the source records for the reporting period in one accessible location; and run an internal dry-run on a sample of formats before the provider starts. Companies that complete the dry-run typically remove the majority of findings before they are raised, because most issues are documentation gaps rather than incorrect numbers.

Why is unit basis the most common source of findings?

Because suppliers answer different questions in good faith. One reports recycled content by weight, another by volume, a third cites a certificate for a material family rather than the supplied item, and the aggregate is then neither. The same problem appears in emissions figures where one format is measured cradle-to-gate and another cradle-to-grave. Fixing the definition in writing and applying it at the point of data collection removes the inconsistency before it reaches the reported figure.

What controls make packaging data auditable?

Six controls cover most of the requirement: a standard supplier data request template, reconciliation of declared data against purchasing records, second-person review and approval before reporting, version control on the register, access controls limiting who can alter figures, and a documented period close that freezes the data. Reconciliation is the control that most improves quality, because it forces a comparison between what suppliers declare and what the company actually buys, exposing material, supplier or unit basis changes.

What happens if a previously reported packaging figure changes?

A prior-period change should follow a written restatement policy and be disclosed with the reason, rather than being edited silently. Silent changes undermine the credibility of the whole report even when the corrected figure is more accurate, and they are the kind of finding that draws attention to the process rather than the number. Decide in advance who can authorise a restatement, what triggers one, and how it is disclosed, so the decision is governed rather than made informally at the end of a reporting cycle.