What Information You Need to List a Carbon Project

The project details, lot details and documents a seller should gather before listing, plus how to choose between a public asking price and price on request.

Listing with us happens in two stages on the seller intake form. First you register the project, once. Then you add one or more lots, each describing a specific block of units you want to sell. Getting the project record right saves time later, because every lot you add sits underneath it and every buyer question starts from it.

This page walks through each field, explains why buyers care about it, and lists the documents worth preparing before you begin.

Stage one: register the project

Registry ID

This is the identifier the standard's registry gives your project, for example a Verra VCS project number or a Gold Standard ID. It is the single most useful piece of information you can give us, because anyone can type it into the public registry and see the project's status, its issuances and its retirements.

Copy it exactly from the registry page. A mistyped digit sends a buyer to a different project, and that tends to end conversations quickly.

Methodology

The methodology is the approved rulebook the project follows to calculate its emission reductions or removals. It has a code and a version number. Give both. Buyers often screen by methodology because some are more accepted than others for particular claims, and a version number tells them whether the project was assessed under current or older rules.

If your project uses a tool or module alongside the main methodology, mention it in the description so a technical reviewer can follow the calculation.

Host country

The country where the project physically sits. For most of our sellers that is India, but aggregators sometimes run activities in neighbouring countries too. Host country matters for two reasons: some buyers have geographic preferences, and the host government is the authority that grants authorisation under Article 6 of the Paris Agreement.

Authorisation status

State whether the host country has authorised the units for international use, and whether a corresponding adjustment will be applied. A corresponding adjustment is an accounting entry by the host government that removes the reduction from its own national total, so the same tonne is not counted twice. If you are not authorised yet, say so plainly, and say where you are in the process.

This field decides whether your units can be offered to airlines for CORSIA in the current phase, and it affects what corporate buyers will pay. Our page on corresponding adjustments explains the background.

Stage two: add your lots

A lot is a quantity of units from one vintage that you want to sell on the same terms. A project with three years of issuance might be listed as three lots, or you might list only the vintages you are willing to sell now.

For each lot you enter:

Vintage: the year in which the reductions or removals took place. This is not the year of issuance, which is often later.
Quantity: how many tonnes of CO₂ equivalent (tCO₂e) are in the lot. Only include units you hold or can contractually deliver.
Asking price: your price in USD per tonne.

Splitting by vintage matters because buyers almost always have a vintage rule. An airline under CORSIA can only use units inside an eligible window, and many corporate buyers set a cut-off year in their own policy.

Public price or price on request

For every lot, you choose whether the asking price is shown on the marketplace or kept on request.

Option	Suits sellers who	Trade-off
Public price	want quick, self-qualified enquiries and are comfortable with the number being visible	competitors and buyers can see it; harder to move upward later
On request	sell large or unusual lots, expect to negotiate, or price differently by buyer	fewer casual enquiries; buyers must contact the desk to learn the price

Either way, prices shown on the marketplace are indicative. They become firm only when the desk confirms availability, vintage, registry details and eligibility in writing. Our article on pricing credits for sale covers how to arrive at the number itself.

Documents to have ready

The form itself centres on project and lot details, but buyers will ask for the full document set as soon as they are serious. We share project documents with qualified buyers before any contract, so having them organised in advance shortens the deal.

Project Design Document (PDD): describes the project, its baseline, its methodology and its monitoring plan.
Validation report: the independent auditor's opinion that the project design meets the standard.
Verification report(s): the auditor's confirmation of the reductions achieved in each monitoring period.
Registry issuance record: proof of how many units were issued, with serial numbers.
Proof of holding or right to sell: a registry account statement, or for traders, the contract with the developer.
Authorisation letter, if you have one, from the host country.

Monitoring reports, site photographs, community agreements for aggregated projects and any rating or label the project carries are also helpful. A buyer's view of this pack is set out in what buyers check before buying.

Common mistakes we see

Listing the issuance year as the vintage.
Entering total project issuance as lot quantity, including units already sold or retired.
Leaving authorisation status blank when the answer is "not yet". Blank looks like hiding something; "not yet, application in progress" looks honest.
Giving a methodology name without its version.

When your details are in order, head to the seller intake form to register the project and add your first lot.