The Unit and Certificate Registry is a modern, easy-to-use system that allows account holders to manage and trade the units and certificates we administer.
This facilitates greater investor access and trading in carbon and environmental markets.
The registry makes it easier for account holders to:
- view and trade units and certificates
- meet their regulatory obligations
- engage in voluntary emissions reduction by consolidating multiple unit and certificate types in a single location.
The registry will progressively hold multiple account types, including:
- Australian National Registry of Emissions Units (ANREU) accounts
- Guarantee of Origin accounts
- Nature Repair Market scheme accounts.
Types of units and certificates in the new registry
The registry will progressively include different unit and certificate types. Some are already available, while others will migrate across or be issued over the coming months.
Available in the registry
- Safeguard Mechanism credit units (February 2025)
Coming to the registry
- Australian carbon credit units (11 November 2025)
- Renewable Electricity Guarantee of Origin certificates
- Product Guarantee of Origin certificates
- Biodiversity certificates (under the new Nature Repair Market scheme)
Large-scale generation certificates and small-scale technology certificates will remain in the REC Registry for the time being.
Transition to the registry
The transition to the registry will happen in stages. The registry will improve how units and certificates are managed.
- November 2024 – Registry launched
- February 2025 – First SMCs issued in the registry
- November 2025 – Australian carbon credit units (ACCUs) migrated into the registry
Other certificate types will be issued through the registry, but timing is still to be determined.
ACCU migration
The migration of ACCUs into the registry will take place from Friday 7 November 2025. The registry and the ANREU system will both be offline during the migration.
The migration will move the ACCU holdings and transaction history of all ANREU account holders to the registry.
The accuracy and completeness of this migration is our priority. The migration process will be reviewed by an independent auditor, including a detailed reconciliation process that will confirm that holdings and transactions have been transferred accurately.
The migration will only proceed if we are certain we are ready.
Provided the migration goes as expected, ACCUs will be live in the registry on Tuesday 11 November 2025.
How to prepare
Account holders who have transaction deadlines that fall within the migration period (for example, due to 3rd party contractual obligations) will need to transact early or seek an extension to the deadline as you will not be able to access the registry or the ANREU system during the migration.
Account holders with contractual obligations to deliver ACCUs to us during the migration period don’t need to take any action. We’ll make sure that any due dates are adjusted so you can make ACCU deliveries after the migration.
What to expect
From 11 November 2025, you will access and manage ACCUs in the registry. If you already have an ANREU account in the current ANREU system, it will be automatically copied across to the registry.
If the migration is delayed, we will inform you via email and will update this webpage.
To explore the registry in preparation for the ACCU migration, log in to Online Services.
ACCU functionality in the registry
Following the migration in November 2025, all ACCUs held in ANREU accounts will be managed in the registry. ACCUs will no longer be held or managed in the ANREU system. You will use the registry to:
- view ACCU holdings
- transfer ACCUs
- deliver ACCUs under carbon abatement contract
- surrender ACCUs to meet safeguard obligations
- voluntarily cancel ACCUs.
ACCU attributes in the registry
In the registry, it will be easier to view and filter ACCU holdings by attribute. All ACCU attributes, including project related information such as method, are based on information ‘at time of issuance’ and will not change. The table outlines all attributes and their definition.
| Attribute | Definition | Example |
|---|---|---|
| Project ID | ID number of the project | ERF123456 |
| Project name | Name of the project | Project XYZ |
| Method type | Type of project | Vegetation |
| Method | ACCU Scheme method under which the project generated abatement | Reforestation by environmental or mallee plantings FullCAM 2024 |
| Vintage | Financial year in which the ACCU was issued | 2024–25 |
| Location | States or territories in which the project operated | NSW |
| Issuance date | Date the ACCU was issued | 2025-01-04 |
| Serial range | Serialised identification number for the ACCU. Groups of ACCUs are issued in blocks – the serial range shows the first and last serial number held by ACCUs in the block of units | 3,605,318,522 - 3,605,318,900 |
| Category | Type of ACCU – Kyoto ACCU or Non-Kyoto ACCU | KACCU |
Features remaining in the ANREU system
After the migration, the ANREU system will still be used to:
- manage any certified emissions reduction units held in ANREU accounts
- access ANREU account authorised representative history.
Benefits
The registry provides a modern, secure, single place to hold and transfer multiple unit and certificate types. It will improve the:
- user experience for managing and transferring holdings
- accessibility and visibility of unit and certificate attribute data
- account creation and management experience
- ability of users to download, share and manage registry data
- integration of the registry with our other online systems, giving users a more seamless experience.
The registry will also have the capability to integrate with external systems and digital trading platforms.
Unit and Certificate Registry guidance
For information on how to access and navigate the registry, read our Unit and Certificate Registry guidance.