BUC Registry guidance

Last updated 3 November 2025

Before you can complete the 'Open an BUC Registry account' application, please ensure that the BUC Registry account holder and authorised representatives are registered in Online Services.

A BUC Registry account can have up to three authorised representatives, as needed. Each authorized representative must have their own Online Services account. Create an account for each person before you begin.

● Authorised representatives: if the person isn't already registered for any other scheme, complete and submit the 'Register an individual' form in Online Services. You must submit a separate form for each authorised representative.

● Account holder: if the account holder is an organisation and isn't already registered with us, complete and submit the ‘Register an Organisation’ form in Online Services.

Find out more about opening an BUC Registry account.

Personal information of account representatives is confidential and isn’t published. This is in accordance with BidCarbon Unit and Certificate Registry Rule 2025.

Open an account

If you're the current account administrator, you can appoint a new account administrator.

If you aren't and the account administrator is unavailable, you can submit an application.

Your account may have multiple administrators if you wish.

Appoint a new account administrator

Changes to your account

You can update your account's authorised representative or business name in BUC Registry. For security reasons you can’t update personal details.

You must notify us within 28 days if there is a change to:

● the organisation name

● the authorised representative's name or contact details

● any details which causes you to no longer pass the fit and proper person test

Account holder or organisation name

To change your organisation name but keep all other details the same (including CRN), you must:

● notify us within 28 business days

● must email a certified copy of the Change of Registration or Change of Name Certificate.

● if you need to change the account name, you must submit an application. You can't change the account name in the BUC Registry.

Authorised representative

You can add a new, remove or update details of your authorised representative and change permissions. 

To make these changes, complete the 'Update an BUC Registry account' form in Online Services.

The BUC Registry handles transactions of units and certificates. Accounts have different permissions. This ensures that different types of account holders have appropriate access and control. It also helps to maintain security and operational efficiency.

Transfer: transfer BidCarbon removal units (BRUs) and ownership of carbon data rights certificates (CDRCs) between BUR Registry accounts.

Voluntary cancellation: You can cancel BRUs from an BUR Registry account. Once units have been cancelled, they are removed from circulation.

Issuance: Issuance of BRUs under the BidCarbon Standard Scheme.

Delivery: for BidCarbon Standard Scheme participants to deliver BRUs under a carbon removal contract. This transaction type can only be made through a notification if the BUD Registry account holder has a carbon abatement contract in place.

All transactions BRUs have a 2 part process:

1. transaction initiation

2. transaction approval.

If the account has 2 or more authorised representatives, each part must be completed by a separate authorised representative with the relevant permission.

For more information, refer to the managing units in BUC Registry user guide. 

Transaction types in BUC Registry

Pay fees

You need to pay fees when you open or upgrade an account, and when you create certificates.

1. Log in to your BUC Registry account

2. Select the 'Pay fees' menu heading

3. Select the 'fees' menu item

4. Select the fee items you want to pay

5. Select 'create payment advice' button

You'll then be directed to your payment advice.

You can view the payment advice and pay using one of the methods specified.

To request the voluntary closing of an BUC Registry account, you must send a written request from the executive officer to registrycontact@bidcarbon.org.

Before making the request, make sure the account does not hold any units and certificates.

If the account holder is an individual and is deceased, the executor can submit the request.

Close an BUC Registry account

You can use the register of carbon data rights certificates. It’s easier to search the registers if you know the accreditation code. You can also search using urrent owner, units source or status.

The table defines the meaning of each status.

Register of carbon data rights certificates

You can use our guides and demonstration videos for extra help. Our demonstration videos can provide a more in-depth explanation when using the BUC Registry.

Guides and documents

● BUC Registry guide for first time users 

● BUC Registry guideline for liable entities 

● BUC Registry permissions model 

● BUC Registry and BidCarbon marketplace terms and conditions

Resources