BUC Registry account guidance

Last updated 3 November 2025

The BidCarbon 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. 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 makes it easier for account holders to:

● view and trade units and certificates

● engage in voluntary emissions reduction by consolidating multiple unit and certificate types in a single location.

Types of accounts

There are 4 types of BUC Registry accounts. Each account has different permissions. They all perform various activities and functions in the BUC Registry. Before you apply, you need to identify the type of account you need.

Some accounts have registration fees.

Before you can complete the 'Open an BUC Registry account' application, you need to make sure 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 authorised 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.

To apply for a BUC Registry account:

● identify the type of account you need

● provide proof of identity

● provide a legal name for the account

● follow the eligibility requirements for the BUC Registry account you want.

Open an account

To hold an BUC Registry account or be an authorised representative, you must pass the fit and proper test. Learn more about our fit and proper person policy.

Fit and proper person test

Verify identity

You're required to verify your identity while completing your registration form. You can either:

● use digital identity verification

● upload certified copies of original documents.

Find out more about the requirements for verifying your identity.

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

Use the Notify the Committee form in Online Services to update these details, and to supply notifications, or make requests relating to the management of your account. You must notify us within 28 days if there is a change to:

● the Fit and Proper Person status of the account holder or authorised representatives

● the legal name of the account holder or existing authorised representatives

● the name of any additional BUC Registry accounts.

The form can also be used:

● to voluntarily close your BUC Registry account

● if you have received units in error

● if you have transferred units to the wrong account due to human error

● to update the email address of an existing authorised representative.

Account holder name

You can use the Notify the Committee form in Online Services to notify us of a change in the legal name of the account holder, provided all other details remain the same (including CRN/TIN). You must:

● notify us within 28 business days

● upload a certified copy of change of name certificate.

Authorised representative

You can add or remove an authorised representative and change permissions for your BUC Registry account. 

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

Changes to your account

Some BUC Registry accounts have fees. To pay these, you can:

● log in to your account

● select the 'Pay' menu heading

● select the 'Fees' menu item

● select the fee items you want to pay

● select the 'Create Payment Advice' button.

A payment advice will be created. You can view the payment advice and pay using one of the methods specified.

Pay the BUC Registry account fee

Functions of different accounts

Close account

The account holder must submit a request to close an BUC Registry account in writing. Make sure the account no longer holds units before you request to close it.

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

You can submit a request to close an account by contact us.

Reports

You can find all of our BRU transaction reports on BRU public reports.