CDM Registry

No. As no further transactions including voluntary cancellations will be possible after 31 December 2026, any credits held in the CDM registry that are not transferred to the Article 6.4 mechanism registry (if eligible) or cancelled by the said deadline will be administratively cancelled. Detailed action timelines can be found in above section “Action timelines of the CDM registry for submissions”.

Decisions adopted at CMP20 specify that all CDM registry transactions should be completed by 31 December 2026. Administrative cancellation occurs on 1 July 2027. The CDM registry closes thereafter. Detailed action timelines can be found in above section “Action timelines of the CDM registry for submissions”.

All cancellations must be completed no later than 31 December 2026. For de-registered projects or programmes of activities/CPAs, indifferent if deregistered as such or due to transition, the applicable deadline is either the administration period of two calendar years (as per the amendments to version 03.0 of the project cycle procedure) or the 31 December 2026, in accordance with the CMP20 decision, whichever occurs earlier. Please refer to EB119_repan02_amendments to PCP-PA on transition and EB119_repan03_amendments to PCP-PoA on transition

CERs that remain in the CDM registry after 31 December 2026 can no longer be transferred, cancelled, or otherwise used through the registry; once these transactions stop, there is no further opportunity under the CDM registry framework for account holders or project focal points to influence the fate of CERs through registry actions, unless the CMP decides otherwise. In addition, any CERs for which no share of proceeds to cover administrative expenses has been paid and that remain in the pending account will be administratively cancelled on 1 July 2027.

Yes. CERs transferred to the Article 6.4 mechanism registry remain valid and active. They may be used towards achievement of first NDCs or other permitted purposes. CERs remaining in the CDM registry after the deadline of 31 December 2026 will be cancelled administratively.

No expiry date applies. The serial numbers will continue to be tracked.

Yes, they can be cancelled in the Article 6.4 mechanism registry. CERs transferred to the mechanism registry will fall under the regulations of Article 6.4.

The secretariat does not regulate registries outside the CDM or Article 6 mechanism.

Issuance requests may be submitted until 30 June 2026.

The registration fee for projects registered under the CDM mechanism is non-reimbursable after publication of the project, and it is not transferrable to the Article 6.4 mechanism. According to the fee schedule of the project cycle procedures EB111_repan10_PCP-PA_(v03.0) / EB111_repan11_PCP-PoA_(03.0) no reimbursement of the registration fee shall be made in any circumstances after the publication of the project.

Remaining balances of paid registration fees can only be credited to the SoP due for subsequent issuances under CDM within the commitment periods (CP) under the Kyoto Protocol and within the established deadline of 30 June 2026 for submitting requests for issuance. The registration fee cannot be used for any issuance beyond CP2 as it would fall outside the applicable Kyoto Protocol period. CDM and Article 6.4 (A6.4) are two different mechanisms.

No. According to the fee schedule of the project cycle procedures EB111_repan10_PCP-PA_(v03.0) / EB111_repan11_PCP-PoA_(03.0), no reimbursement of the SoP shall be made after units have been issued.

The United Nations Carbon offset platform will be affected by this decision and the established deadline of 31 December 2026 for the voluntary cancellation of CERs. The phase down timeline for the platform is currently being assessed and will be submitted to the Executive Board of the CDM for their consideration.

The cooperation with our partner Carbon Trade Exchange (CTX) and their wholesale platform for larger scale sales of CERs for businesses, corporations, and institutional buyers will also be affected. The current agreement with CTX ends on 31 December 2026; the linking arrangement went first live in 2017. The winding down timeline for the platform is currently being assessed and will be communicated on this page.

The deadline for listing new projects on the VCP is scheduled for 15 August 2026 allowing the secretariat enough time to do relevant checks and payments to be processed in a timely manner via bank transfer.

The deadline for placing an order on the VCP will be determined in consultation with the Executive Board of the CDM. Proposed deadlines: 30 September 2026 for payments by bank transfer and 10 December 2026 for payments via PayPal.

CERs offered on the VCP are held in the pending account of the CDM registry and can be cancelled until the provided winding down timelines either for voluntary cancellations on the platform or for voluntary cancellation via the CDM workflow following the established procedure. CERs remaining in the CDM registry beyond the winding down timelines will be cancelled administratively in 2027.

CERs held in the CTX reserve account can be returned to the pending account at any time prior to the cited winding down timelines. CERs remaining on the CTX reserve account beyond the winding down timelines will be cancelled administratively in 2027. Please contact the secretariat at cdm-registry@unfccc.int for guidance.

Decision 2/CMP 17 establishes the conditions under which CERs can be transferred. Please refer to section III. Transfer of certified emission reductions to the mechanism registry of the Article 6, paragraph 4, mechanism under the Paris Agreement.

Decision 3/CMA3, Annex, provides relevant information on the eligible CERs in section XI. Transition of clean development mechanism activities and use of certified emission reductions towards first nationally determined contribution, under B. Use of certified emission reductions towards first or first updated nationally determined contributions.

Eligible CERs held in the CDM registry can be transferred following the relevant Procedure for Submission of requests for transfer of CERs in accordance with paragraph 11 of decision 2/CMP.17. Further information and access links will be shared soon.

Yes. CDM account holders may transfer eligible CERs to any account in the Article 6.4 mechanism registry. Please refer to the Procedure for Submission of requests for transfer of CERs in accordance with paragraph 11 of decision 2/CMP.17

No. Approval in the Article 6.4 mechanism registry does not need to match the Party that approved the entity under the CDM. Transfers may be made to any valid Article 6.4 mechanism registry account. Please refer to the Procedure for Submission of requests for transfer of CERs in accordance with paragraph 11 of decision 2/CMP.17

The existing Procedure: Article 6.4 mechanism registry covers account opening, approvals, and transfers. In case of new decisions and/or guidelines, the registry webpages will be updated accordingly.

For deregistered projects or programmes of activities/CPAs, regardless if deregistered as such or due to transition, the applicable deadline for transactions is either the administration period of two calendar years (as per the amendments to version 03.0 of the project cycle procedures) or the 31 December 2026, whichever occurs earlier. See EB119_repan02_amendments to PCP-PA on transition and EB119_repan03_amendments to PCP-PoA on transition.

No. The MoC submitted under CDM remains valid for projects or PoAs transitioned to the Article 6.4 mechanism.

Yes. Article 6.4 mechanism registry accounts can be opened after a project has fully transitioned, i.e. registered under the Article 6.4 mechanism and deregistered from the CDM. Host Party authorized participants may request to open accounts pursuant to the Procedure: Article 6.4 mechanism registry. The UserGuide_Interim_Mechanism_Registry is available to guide the process of opening an account in the interim mechanism registry and will link to the relevant forms.

The date of the formal approval by the Supervisory Body signals the effective registration under the Article 6.4 mechanism and deregistration from CDM for a project or programme of activity under transition. The transition procedure will no longer apply but the respective Article 6.4 procedures.

For CERs of transitioned projects or PoAs remaining under CDM that are not transferred to Article 6.4 the above mentioned CDM rules apply until 31 December 2026 or until the end of the two-year administration period – whichever is earlier.

No. CERs issued under the CDM regime will remain in the CDM registry unless the focal point requests transfer according to the Procedure for Submission of requests for transfer of CERs in accordance with paragraph 11 of decision 2/CMP.17. This said, CERs of transitioned projects will not automatically transition to Article 6.4 mechnism registry along with the project.