Carbon Credit Registry: What It Is and How It Works

A carbon credit registry is a database that keeps a record of carbon credits. Each credit usually has a serial number, a project it came from, and a status such as issued, transferred or retired. The record helps show who holds a credit and whether it has already been used.

Registries are run by different programs, and their rules differ. Well-known examples include Verra VCS, Gold Standard, American Carbon Registry and Climate Action Reserve. Each has its own methods, documentation requirements and review steps, so a credit from one program is not automatically the same as a credit from another.

A registry is not the same as an exchange, a broker or a credit itself. It generally records and tracks credits rather than setting terms between buyer and seller. Details such as additionality, permanence, vintage and double-counting risk vary by project and registry, so they are worth understanding case by case.

Traditionally, a project developer submits a project to a program, goes through review by independent validators and verifiers, and then may have credits issued to an account on the registry. The credits can then be moved to a buyer's account or retired on the buyer's behalf.

Buyers have typically looked up a credit's serial number on the public registry to see its status and project documents. Many also ask for supporting paperwork from the seller, such as verification reports, and compare it with what the registry shows.

Offtake agreements, where a buyer commits to purchase credits from a project over time, often refer to a specific registry and the way credits will be delivered or retired. Different projects, including biochar, engineered removal and methane capture, may use different registries and methods.

The right buyer may help you make sense of registry terms and what they may mean for a particular project. A conversation is generally a chance to explain your project type, the registry you are using or considering, and what you hope to achieve, without any promise of a match or a sale.

A visit is often a discussion of project details. You might share where the credits are or will be registered, how they are described, and what documents you can provide. A thoughtful buyer may point out what they would want to see and how they like to handle transfer and retirement.

Useful questions to ask include: Which registry and program do you prefer or accept? How do you check status and serial numbers? How do you view corresponding-adjustment treatment, vintage and permanence? What documents do you need, and how are retirement and delivery handled? Always confirm registry status and verification directly with the seller and the registry yourself.