The legal obligation to report on sustainability and the extension of this to SMEs is unlikely to be long in coming. Once this has been introduced, a statutory audit obligation is also likely to be introduced in the medium term.
To date, sustainability reports have been audited in accordance with the international auditing standard ISAE 3000. Which examines the sustainability management concept and other disclosures in the report. The audit standard is intended to ensure the comparability of audit services.
The audit process in general is comparable to that of a traditional audit of financial statements. This means that the reporting processes are recorded and selected disclosures must be supported by correspondingly resilient audit evidence.
The audit is documented by a note on the sustainability report.