KZR certification for biomass suppliers to the power sector — what it delivers and how to verify it

If you buy biomass for a power unit or district heating plant, and your company accounts for renewable energy production, a KZR certificate is effectively a mandatory condition on the supplier side. Without it, the energy generated from that biomass will not be counted as renewable, and along with that you lose the certificates of origin, the revenue from support schemes and part of the favourable emissions accounting. This is not a formality — it is a financial condition.

The requirement does not stem from local regulatory caution but from the RED II Directive (2018/2001) and its update in the form of RED III, transposed into the Polish legal order through, among others, the Act on Liquid Biocomponents and Biofuels and implementing acts covering renewables. The National Sustainable Development System for biomass and biofuels (colloquially "KZR") is Poland's answer to the obligation to prove that biomass meets EU sustainability and GHG emission reduction criteria.

Below, we show how KZR works in practice, how it differs from ISCC and SBP, what URE looks at, how to verify a counterparty, and what should be included in a supplier contract so that the compliance team does not run into problems later.

What KZR is and where it came from

KZR is a national certification system confirming that biomass (or biofuel) meets the EU sustainability criteria set out in the RED II Directive. The system operates on the same logic as the voluntary schemes recognised by the European Commission (e.g. ISCC EU), with the difference that it is national and was designed with the Polish supply chain in mind — from forestry and agriculture, through intermediaries and producers, to end users in the power sector.

In practice, KZR serves two functions:

• Evidence of compliance with sustainability criteria — origin of the feedstock, environmental criteria, restrictions on land with high biodiversity value.
• Evidence of genuine GHG emission reduction against fossil fuels, calculated in line with the RED II/RED III methodology.

If the power sector wants to count energy from biomass as renewable, it must hold documentation confirming compliance with these criteria across the entire supply chain. In Poland, KZR is the most frequently chosen way to document this.

Who requires it and why it is not optional

The requirement for a certificate (KZR or an equivalent recognised by the EC) on the supplier side is imposed above all by:

• Power plants and CHP plants accounting for biomass production under the certificates of origin scheme or the auction system.
• Utility-scale district heating plants using renewable support instruments.
• Foreign buyers, for whom Polish biomass must comply with RED II/III in the country of use.
• Financing institutions — banks and funds financing renewable projects increasingly require a documented sustainable biomass chain as a condition for releasing a tranche.

In short: the absence of a certificate on the supplier side means the buyer is unable to prove compliance with RED II. And if they cannot prove it — there is no renewable status, no certificates, no support.

The structure of the KZR system — who is who

Understanding the roles in the system makes it easier to verify a counterparty. A simplified diagram looks as follows:

Role	Who this is	What they do
System administrator	Entity operating the KZR certification system	Manages the rules, publishes requirements, maintains lists
Certification body	Accredited auditing entity	Runs the audit at the participant, issues the certificate
System participant	Company in the supply chain (forestry, sawmill, producer, intermediary, buyer)	Implements the system's requirements, undergoes the audit
Regulator	URE, KOWR and other authorities	Recognises the documentation when settling renewable support

Key point: the certificate is issued by the certification body, not by the system administrator. The certificate number, expiry date and scope must match the register published in the system.

Scope of certification — what exactly is checked

A KZR audit does not consist of issuing a "biomass OK" piece of paper. The auditor examines the entire supply chain management system. A typical scope covers:

• Feedstock origin (chain of custody) — whether the biomass source can be identified, whether mass flows balance, whether there is no "mixing" of certified and non-certified feedstock without proper segregation.
• Sustainability criteria — whether the feedstock does not come from excluded areas (e.g. land with high biodiversity value, protected areas, land converted after the cut-off date).
• Emissions footprint (GHG) — calculation of life-cycle emissions in line with the RED II/III methodology and demonstration of the required level of reduction against fossil fuels.
• Management system — procedures, responsibilities, training, documentation, internal audits.
• Transaction documents — KZR declarations of conformity issued at sale, and their consistency with invoices and weights.

In practice, the supplier must be able at any moment to reconstruct the path of a biomass batch from source to buyer and show that the mass balance and emissions add up.

KZR vs ISCC vs SBP — which system, when

The three acronyms often appear together but do different things. A short comparison:

System	Character	Typical use	Recognition in PL
KZR	National certification system compliant with RED II/III	Biomass and biofuels for the Polish market, utility-scale power generation	Recognised by the Polish regulator for renewable accounting
ISCC EU	Voluntary scheme recognised by the European Commission	International markets, biofuels, biomass, also chemicals and plastics	Recognised at EU level, functionally equivalent within the RED scope
SBP	Sustainable Biomass Program — industry scheme for woody biomass	Mainly industrial pellet for export (UK, DE, NL, DK, JP, KR)	Recognised commercially by large foreign buyers

Simplified rule of thumb:

• You sell to Polish utility-scale power generation — the priority is KZR (or another EC-recognised system, e.g. ISCC EU).
• You sell industrial pellet for export — the buyer will most often require SBP alongside RED-compliant certification.
• You sell biocomponents for liquid biofuels — ISCC EU comes up more often.

The systems are not mutually exclusive. Many large suppliers maintain KZR + ISCC + SBP in parallel to be able to service different sales channels. BGT holds current certification under the KZR system, which is the basic requirement for Polish utility-scale power sector customers.

How to verify a counterparty in practice

Even if a supplier "has KZR", always verify it yourself. The certificate may be expired, suspended, or cover a different scope than what they are selling you. A practical checklist:

1. Request a scan of the current certificate — with the number, issue date, expiry date and scope.
2. Check the number in the system's register — the system administrator publishes a list of participants. If the number is not in the register or the status is other than "active", that is a warning sign.
3. Verify the scope of the certificate — not every certificate covers all types of biomass and all roles in the chain. A certificate issued for "pellet production" does not necessarily cover "trade in wood chips".
4. Check the certification body — whether it is accredited to conduct audits in the given system.
5. Ask for the template declaration of conformity that the supplier issues on delivery. This is the document that will subsequently go into your renewable-energy dossier.
6. Establish who bears the risk of losing the certificate during the term of the contract — this should be written into the agreement.

Consequences of not holding a certificate — hard numbers on the buyer side

Let's tally up the consequences on the power sector side, because those are what justify the whole effort:

• No renewable classification of the energy — a non-certified delivery cannot serve as the basis for issuing certificates of origin or for settlement under the auction / FIP / FIT scheme.
• Risk of certificate revocation — if an inspection finds that the supply chain documentation does not hold together, the certificates issued for that energy may be challenged.
• Administrative penalties — for unreliable data in reporting to URE / KOWR.
• Loss of benefits under EU ETS — biomass meeting sustainability criteria is accounted for with a zero emission factor. Without certification, this benefit disappears and the full cost of allowances kicks in.
• Reputational and financial risk — banks financing the project may treat a breach of the criteria as a breach of ESG covenants.

In short: the absence of KZR on the supplier side can cost the buyer many times more than the price difference per tonne of biomass.

How long obtaining KZR takes and indicative costs

From the supplier's side, the certification process in simplified form looks like this:

1. Selecting a certification body and signing an agreement.
2. Implementing the procedures (chain of custody, mass balance, GHG calculation, documentation).
3. Pre-audit / preparatory audit.
4. Certification audit.
5. Issuance of the certificate (typically for a period of up to 12 months).
6. Surveillance audits in subsequent annual cycles.

A realistic implementation time for a well-prepared company is several months. Audit costs depend on the scale of operations, the number of locations and roles in the chain — the more complex the entity (e.g. producer + trader + exporter), the higher the cost. Quoting specific rates without knowing the company is risky, so treat audit offers like any other compliance services purchase: a minimum of two offers, comparable scope.

What to include in a biomass supplier contract

From the perspective of a power sector procurement team, a good supplier contract should contain at least:

• A requirement to hold a current KZR certificate (or an equivalent recognised by the EC) throughout the term of the contract, with an obligation to promptly report its suspension or revocation.
• A certification scope matched to the subject matter of the contract (type of biomass, role in the chain).
• An obligation to issue a KZR declaration of conformity with every delivery, using a defined template and minimum dataset.
• A right of audit of the supplier by the buyer or a party designated by them.
• A liability clause for damage arising from the energy not being counted as renewable through the supplier's fault (loss of certificates, penalties, ETS costs).
• A termination clause in the event of loss of the certificate.
• A requirement for compliance with the current version of RED (currently RED III) and a procedure for updates in the event of regulatory changes.

This is not paranoia — it is the standard already applied by major power groups today.

RED III — what is changing and why it matters now

RED III (the 2023 update of the renewables directive) tightens some requirements for forest biomass, clarifies the cascading principles for the use of woody biomass and raises the GHG emission reduction thresholds for new installations. The direction is clear: more evidence, higher thresholds, fewer exceptions.

For suppliers, this means the need to update documentation, procedures and emissions calculations to the new version of the requirements. For buyers — the need to check whether the supplier's certificate covers the version aligned with current regulations, and not merely the historical RED II version. In practice, this is an argument for expressly referring in the supplier contract to "the currently binding version of the renewables directive", rather than to a specific directive number.

Frequently asked questions (FAQ)

Does ISCC EU replace KZR when selling to the Polish power sector? Functionally, both systems are recognised in the context of RED II/III. In practice, Polish buyers most often prefer KZR as the national system, but well-documented ISCC EU is also respected.

Is an SBP certificate enough to sell biomass to a Polish power plant? SBP alone is not sufficient for RED II/III accounting in the Polish power sector. In practice, SBP is a supplementary layer, complementary to KZR or ISCC.

What happens if the supplier loses the certificate during the contract? From the moment the certificate loses validity, deliveries cannot be treated as certified biomass. The buyer should have a mechanism in the contract for immediate response — suspension of deliveries, damages claims, right of termination.

Does the power sector buyer itself have to be a KZR system participant? Yes, if it wants to be the final link in the documentation chain and issue documents to URE. Certification of the supplier alone does not release the buyer from having its own RED-compliant supply chain management system.

How long does one certification cycle last? Certificates are usually issued for a period of up to one year, with surveillance audits in subsequent cycles. The exact term and format depend on the certification body and the system.

Are all types of biomass subject to the same requirements? No. The requirements differ, among others, for forest biomass, agricultural biomass and residues. RED III clarifies some of these categories — which is why the contract must expressly identify the type of feedstock.

Summary

KZR is not "paperwork for paperwork's sake" — it is the condition on which the entire revenue model of biomass power generation in Poland rests. Without a certificate on the supplier side, the buyer loses the ability to count energy as renewable, loses certificates of origin, loses EU ETS benefits and loses credibility with lenders.

Three things worth remembering:

• Verify, do not trust. Certificate number, expiry date, scope, certification body — to be checked in the system's register every time.
• The contract must transfer risk. If the supplier loses the certificate, the cost of that loss cannot stop at the buyer.
• Look at RED III, not just RED II. Regulations are heading towards higher thresholds and fuller documentation — a supplier who is not keeping up today will not be able to service your volumes tomorrow.

BGT trades biomass with full KZR system documentation — if you are planning to secure volumes for the next season and want to verify how the documentation chain will look for your installation, get in touch with our sales team. We will send you the full set of documents and a template declaration of conformity for approval by your compliance department.