Assurance & year-lock

Independent sign-off, built in.

Give your external auditor a read-only seat. They record their assurance and lock the reporting year — after which the figures can’t move.

Lock only what's assured

Freeze the exact indicators under assurance so those figures can’t move — while everything else stays editable.

Selective assurance lock

✓Scope 1 & 2 emissions — locked

✓Energy — locked

Community data — still editable

✓ Assured figures frozen across every entity

The auditor’s evidence pack

Auditors download a single pack with every emission factor, its source and the full calculation trail — so any figure can be re-derived.

Emissions audit pack

✓Every factor, with its source

✓Full calculation trail per figure

✓ One download, ready for the file

Read-only auditor role

Auditors review and sign off without any write access.

Auditor access

✓Can view every figure

✓Can open all evidence

!Cannot edit — read-only

Sign-off on record

Provider, level and statement, stamped against the year.

Assurance · FY2025

Assurance provider0

Limited assurance✓ signed off

Stamped against FY 2025

Year-lock

Freeze a reporting year against any further edit.

Freeze the year

✓FY 2025 figures final

✓🔒 FY 2025 locked

Figures can no longer change

Ready when you are

See Tellus on your own data.

Map one figure to every framework, lock a reporting year, and hand your assurer a clean audit trail. A 30-minute walkthrough shows you how — walking through your own numbers.

Book a walkthrough →

GHG Protocol Scope 1–3 · IFRS S1 & S2 (ISSB) · Bursa Malaysia · GRI · SASB · FTSE Russell · ISSA 5000 · ISAE 3000 / 3410 & AA1000-ready · SOC 2 Type II infrastructure (Singapore) · PDPA 2010 compliant