WorkSafe says it has found forged certificates being used for diesel storage tanks and is asking businesses to confirm their paperwork is genuine.

The agency has not said how many forged documents it has identified, where they were found, or who is responsible. Its advice is aimed at anyone operating stationary diesel tanks, including farms, construction sites, transport depots and workshops.

Diesel tanks require sign‑off from an authorised compliance certifier to confirm they meet safety requirements. Using a tank that isn’t properly certified — or relying on forged paperwork — can expose people to risk and leave businesses open to enforcement action.

WorkSafe is urging operators to:

• Confirm the certificate details directly with the named compliance certifier.
• Check the certifier is listed on WorkSafe’s public register and that the certificate is current.
• Review the certificate for inconsistencies, such as incorrect names, expired dates, or formatting that doesn’t match other official documents.

Anyone who suspects a forged certificate is being used is encouraged to contact WorkSafe and their compliance certifier.