“One of the pioneering firms in web3 solutions, digital assets and tokenization, recognized for its innovation and solid reputation across Spain and Latin America.”
Jorge CorredorLawyer, Rincón Cuéllar & Asociados
Tokenized carbon credits. From registry to retirement.
Tokenized carbon credits must remain tied to their registry serials until retirement. We build platforms to represent issued credits or finance projects through bonds linked to their sales. Registry reconciliation helps detect discrepancies and control double counting, within the rules of each crediting program.
They trust Metlabs with their carbon credit tokenization projects
Why now
Why tokenize carbon credits now?
Nearly 30% of global emissions already carry a direct carbon price, and carbon credit issuance grew 8% in 2025, according to the World Bank. Since 2022 Verra has banned tokenizing credits that are already retired, so the quality of an issuance depends on its link to the program's registry.
Platform
Platform for tokenized carbon credits and project bonds
A tokenized credit has to stay tied to its registry serial until retirement. The white label platform covers the bond issuance, KYC or KYB onboarding and the coupon console, while the registry connection, ERC-1155 tokens and retirement are custom-built, within what each program allows.
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Registry connection
Imports serial, project, methodology and vintage, and only issues the token once the unit is locked in a registry account, where the program allows it.
ERC-1155 token per series
Each project and vintage gets its own ID, with one token per credit and transfers only between eligible accounts.
Retirement with beneficiary
Burns the token once the registry confirms the serial's retirement, with the beneficiary and the claimed use on record.
KYB buyer onboarding
Verification of the buying company, its signatories and its jurisdiction before the first purchase or retirement.
MRV data and verification
Monitoring reports, verifier and project documents linked to each series and available for buyers to review.
Back office and reconciliation
An issuer console to reconcile balances with the registry, pause series, resolve incidents and export reports.
Institutional custody, integrated
We integrate custody and key management providers through their APIs, including Fireblocks, BitGo, Coinbase Prime, Anchorage Digital, Copper and Ledger Enterprise. Depending on the provider and model, keys are managed with MPC or multisig so that none depends on a single device. If the token is a security, custody on behalf of clients is provided by an authorized entity.
Structure
What does a carbon credit token represent?
Rarely the credit itself. The token is a right against the issuer, over a unit locked in the registry, over future credits or over the proceeds of their sale, and that right decides who can retire it, who you can sell it to and which rules apply.
| Criterion | Issued credit | Forward credit purchase | Bond linked to sales |
|---|---|---|---|
| What the holder receives | A right over a verified unit, exercised on retirement | Future credits if the project generates them | A coupon linked to credit sales and the principal |
| Usual framework | Program rules, plus MiCA if offered publicly | Forward contract, reviewed as derivative or security | Securities market rules |
| Horizon | Until retirement | Until each vintage is issued | The bond's maturity |
| When we recommend it | Companies retiring credits for their climate claims | Projects that need capital before verification | Verified projects funding a new phase |
The choice depends as much on your legal counsel as on the crediting program's rules. The token contract never goes beyond what the registry allows.
Methodology
How we tokenize a carbon credit project, step by step
Representing issued credits, selling future credits or funding a project with bonds linked to its sales follows four phases. The rules of the crediting program and its registry apply throughout, because they decide what can be tokenized and how each credit is retired.
We study the project, its crediting program, its verified or expected credits and the target investor or buyer, and define whether the token represents an issued credit, a forward purchase or a bond linked to sales. The output is the issuance model.
The law firm separates voluntary credits from EU ETS allowances, classifies the token, sets the offering route and checks what the program allows, such as consent to tokenize or the ban on tokenizing retired credits. Those conclusions become token rules.
The white label platform covers KYC or KYB onboarding, e-signature, SEPA or stablecoin payment, ERC-3643 bond tokens and the payment console. ERC-1155 tokens per series, the link to the program registry and retirement with a named beneficiary are custom-built.
Bonds reach investors and credits reach corporate buyers through the issuer's network and specialist channels, and we measure every step up to payment. Afterward, each sale or retirement is reconciled with the registry before paying out or burning the token.
Assets
Which carbon credits can be tokenized?
Credits from programs that permit digital representation, with identifiable serials, methodologies and verifiers. Each project requires a review of registry terms and unit treatment before tokens are issued.
Forests and conservation
Reforestation, avoided deforestation and restoration with permanence.
Renewable energy
Solar, wind or hydro projects whose eligibility depends on the methodology and crediting program.
Capture and storage
Direct air capture, geological storage and removals with their own MRV.
Agriculture and soil
Soil carbon, grassland and regenerative practices with verification.
Waste and methane
Biogas capture, landfill projects, composting and waste treatment.
Future credits
Forward purchases tied to the verification of each vintage.
Reviews
What do our clients think of Metlabs?
“We structured the tokenization of real estate projects with them, and I value the team's ability to understand our corporate needs and genuinely solve them.”
Joan MejíaManager, GLOBYNE
“They advised us on the feasibility of tokenizing real estate assets in Uruguay with direct, cordial treatment. A professional team, responsive and always available.”
Álvaro Silva SantamaríaCEO, Sp Inmuebles
“Great professionals at structuring tokenized projects, with technical command and attention to detail that inspire full confidence at every stage of the work.”
Francisco BetancourtVerified Google review
“As a blockchain lawyer, I value their experience and professionalism in consulting and executing tokenization projects. Technology partners you can fully trust.”
Vanessa RivasBlockchain lawyer, El Salvador
“Great professionals, very attentive to their clients and always mindful of every detail. Working with their team has been a genuine pleasure from start to finish.”
CriptorentVerified Google review
“A very professional yet approachable company that empathizes with your doubts and needs. Highly recommended for entrepreneurs with a tokenization project.”
Javier EspasaTokenization entrepreneur
“Exceptional in every sense. From legal support I value their rigor and transparency: working with Metlabs means professionalism, innovation and security.”
Pedro A. Agúndez MéndezGoogle Local Guide
“Excellent service across blockchain development, asset tokenization and consulting. A very professional team that I recommend wholeheartedly, without reservation.”
José Luis DíazVerified Google review
“I have worked with them on several projects and they are very professional. A guarantee that everything turns out perfectly. Without a doubt, 100% recommended.”
Ignacio Fernández JiménezVerified Google review
“One of the pioneering firms in web3 solutions, digital assets and tokenization, recognized for its innovation and solid reputation across Spain and Latin America.”
Jorge CorredorLawyer, Rincón Cuéllar & Asociados
“Great professionals at structuring tokenized projects, with technical command and attention to detail that inspire full confidence at every stage of the work.”
Francisco BetancourtVerified Google review
“A very professional yet approachable company that empathizes with your doubts and needs. Highly recommended for entrepreneurs with a tokenization project.”
Javier EspasaTokenization entrepreneur
“I have worked with them on several projects and they are very professional. A guarantee that everything turns out perfectly. Without a doubt, 100% recommended.”
Ignacio Fernández JiménezVerified Google review
“We structured the tokenization of real estate projects with them, and I value the team's ability to understand our corporate needs and genuinely solve them.”
Joan MejíaManager, GLOBYNE
“As a blockchain lawyer, I value their experience and professionalism in consulting and executing tokenization projects. Technology partners you can fully trust.”
Vanessa RivasBlockchain lawyer, El Salvador
“Exceptional in every sense. From legal support I value their rigor and transparency: working with Metlabs means professionalism, innovation and security.”
Pedro A. Agúndez MéndezGoogle Local Guide
“They advised us on the feasibility of tokenizing real estate assets in Uruguay with direct, cordial treatment. A professional team, responsive and always available.”
Álvaro Silva SantamaríaCEO, Sp Inmuebles
“Great professionals, very attentive to their clients and always mindful of every detail. Working with their team has been a genuine pleasure from start to finish.”
CriptorentVerified Google review
“Excellent service across blockchain development, asset tokenization and consulting. A very professional team that I recommend wholeheartedly, without reservation.”
José Luis DíazVerified Google review
Regulation
Check the regulation by countryWhich regulation applies to carbon credit tokenization?
It depends on the market and the right. A voluntary credit follows its program's rules and, if the token is offered to the public, may be a crypto-asset under MiCA. An EU ETS emission allowance is a financial instrument under MiFID II.
The first thing we review is the program registry's terms, because they decide whether the unit can be locked, who retires it and whether a token is allowed. Then we settle the target buyer or investor and the offering route with your law firm.
In the voluntary market, the program and its registry set the rules. Since 2022 Verra has banned tokens created from retired credits, Gold Standard requires its express written consent and ICVCM sets integrity criteria. In the EU, Regulation 2024/3012 creates a voluntary framework to certify permanent removals, carbon farming and carbon storage in products, and since September 27, 2026 national rules transposing Directive 2024/825 ban presenting a product to consumers as carbon neutral on the basis of offsetting.
EU ETS emission allowances are listed as financial instruments in Annex I of MiFID II, so tokenizing them falls under the financial instruments framework, not MiCA. Financing future credits or sharing project revenue, as a bond linked to sales does, also requires securities, derivatives and investor-protection analysis.
- SpainCNMV, Banco de España, SEPBLACFavourable100Oct 2026
- UAECMA, CBUAE, VARA, DFSA, FSRAFavourable95Apr 2026
- SwitzerlandFINMAFavourable90Jan 2026
- El SalvadorCNAD, BCR, SSF, UIFFavourable88Apr 2025
- ArgentinaNational Securities Commission and Financial Information UnitFavourable83Jun 2026
- United StatesSEC, CFTC, FinCENFavourable76Sep 2026
Spain
UAE
Switzerland
El Salvador
Argentina
United StatesOur legal partners
Does the token create a new carbon credit?
No. The credit originates in a crediting program, with its methodology and verifier. The token represents a right against the issuer over a unit that is already issued and locked, or a documented future right. Its environmental value depends on the project, not on the network, as our guide to tokenized carbon credits explains.
How is double counting of a tokenized credit prevented?
With one-to-one correspondence between token and serial, the unit locked in the registry while the token circulates, and a retirement in the registry that, once confirmed, burns the token. If the credit is used toward another country's climate target, Article 6 of the Paris Agreement also requires a corresponding adjustment by the host country.
Does tokenizing a carbon credit make it easier to sell?
Not by itself. It makes fractional holdings, transfers and proof of retirement easier, but liquidity depends on buyer demand, project quality and the existence of a market where the credit can be traded under clear rules.
Can EU ETS emission allowances be tokenized?
Technically yes, but they are financial instruments under MiFID II and live in the Union Registry. Any digital representation needs the financial instruments framework, authorized firms and reconciliation with that registry, which is a very different project from voluntary credits. The EU DLT Pilot Regime does not cover them.
Why use ERC-1155 for carbon credit tokenization?
Because one ERC-1155 contract can manage many series at once. Each project and vintage combination gets its own ID, credits within a series are interchangeable and retirement is applied series by series. We build it custom, with permissions for verified accounts, and when the token is a project bond we use ERC-3643.
Asset tokenization
Other assets we tokenize.
Asset tokenization
Articles on tokenization
Carbon credit tokenization companies: roles and selection
Compare registries, protocols and technology providers by role. Selection requires checking methodologies, credit eligibility, reconciliation and retirement; a token alone does not certify environmental benefits.
Carbon tokens: a guide to tokenized carbon credits in 2026
Tokenized carbon credits: link units, tokens and retirements, verify backing and distinguish traceability from environmental quality.
Real Asset Tokenization: How RWA Tokenization Works
How to structure an RWA project: holder rights, issuance, recordkeeping, payments and recovery. What blockchain adds and what depends on the legal arrangement.
Take your credits to a traceable issuance.
We start from the program registry's terms and the verification schedule to decide what the token represents and where it is issued.
