Serial numbers represent unique issued credits and are thus important to reassure buyers that the credit they are buying is currently still available. Different registries have different unique serial numbers to represent their credits.
Registries powered by APX registry software
Verra
Credits in Verra are known as VCUs. See Verra’s documentation on VCU serial numbers here. Verra represents a block of VCUs within one unique serial number. An example serial number range for Verra looks like this: 0001-000001-000100-VCS-VCU-003-VER-US-0003-01012020-31122020-1
This range represents 100 VCUs.
There are several ways to access the serial number range – here are two approaches:
- Through the Issuance Records of a project’s registry listing page
- From the Issuance Serial Number Lookup feature within a Verra registry account
CAR
Credits in ACR are known as CRTs. See CAR’s documentation on CRT serial numbers here. CAR represents a batch of CRTs within a serial number range. An example serial number range for CAR looks like this: CAR-1-US-293-1-120-CA-2006-102-1 to 29251
This range represents 29250 CRTs.
There are several ways to access the serial number range – here are two approaches:
- Through the Project Offset Credits Issued feature. Link here
- From the Search Serial Numbers feature within a CAR registry account. Link here
ACR
Credits in ACR are known as ERTs. See ACR’s documentation on ERT serial numbers at the bottom of this page. ACR represents a batch of ERTs within a serial number range. An example serial number range for ACR looks like this: ACR-US-192-2010-203-1-5000
This range represents 5000 ERTs.
There are several ways to access the serial number range – here are two approaches:
- Through the Project Offset Credits Issued feature. Link here
- From the Search Serial Numbers feature within an ACR registry account. Link here.
Registries powered by IHS Markit registry software
Plan Vivo
Credits in the Plan Vivo Standard are known as PVCs. See Plan Vivo’s documentation on PVC serial numbers on this page. An example serial number range for Plan Vivo looks like this: PV-PVC-TZ-103000000004180-01022020-31012021-7021949-7022001-MER-0-P
This range represents 53 PVCs.
There are several ways to access the serial number range – here is one approach:
- Through the Manage My Units section within your Plan Vivo IHS Markit registry account
Registries powered by Grexel registry software
Puro
Credits in Puro are known as CORCs. See Puro’s documentation on ERT serial numbers here. Puro represents a batch of CORCs with a starting certificate number, and an ending certificate number. An example serial number range for Puro looks like this: 643002406555908610000000081547 to 643002406555908610000000081681
This range represents 135 CORCs.
You can access serial number ranges in Puro from the Certificates section within Puro’s GREXEL registry account.
Other registries
Gold Standard
Credits in Gold Standard are known as VERs. See Gold Standard’s documentation on VER serial numbers at the bottom of this page. ACR represents a batch of ERTs within a serial number range. An example serial number range for Gold Standard looks like this: GS1-1-IN-GS10710-5-2020-23521-1-13061
This range represents 13061 VERs.
There are several ways to access the serial number range – here are two approaches:
- From the Public Issuances and Public Retirements feature within the GS Impact Registry. Link here.
- Through the My Credits section within your GS Impact Registry account
Others
Is your project registered on another registry? Please reach out for guidance on the serial numbers that represent unique credits on your particular registry. We seek to keep this guide updated over time for a comprehensive list of registries.