Blockcerts Forum

Topic	Replies	Views	Activity
FAQ - technical issues Technical AttributeError: ‘CertificateBatchHandler’ object has no attribute ‘certificates_to_issue’ Solution: Error: with cert_issuer -c conf.ini(AttributeError: ‘CertificateBatchHandler’ object has no attribute 'certificates_t…	2	1198	July 11, 2022
Welcome to the Blockcerts community	1	7310	March 10, 2017
[Identity verification]Why derive and compare issuing address with transaction? Support	2	2643	November 17, 2025
Android app issue adding credential Support	2	50	October 24, 2025
Demande d'aide à la communauté	1	23	October 22, 2025
Unable to add Issuer on Android 15 (flip back to same page after clicking"add issuer") Support	0	19	October 6, 2025
Blockcerts verifier Support	1	41	September 29, 2025
Looking for Best Practices for Verifying Blockcerts Without Central Authority?	1	66	July 17, 2025
Why can anyone with a link to the credential add it Support	1	69	July 17, 2025
Why add issuer option(mobile wallet) returns diferents pubkey each time Technical	1	566	July 9, 2025
Google Play App Not Available Technical	1	47	June 4, 2025
No se ha podido obtener el perfil del emisor	2	74	April 28, 2025
Apple App store link on https://wallet.blockcerts.org/ Technical	2	83	April 9, 2025
cert_issuer.errors.InsufficientFundsError: Please add 500000000000000 wei	5	663	April 9, 2025
How can I create my own Context? Technical	1	50	April 9, 2025
Issue with Certificate Upload - "Invalid Credential" Error	14	147	April 9, 2025
Error: SignedTransaction object has no attribute 'rawTransaction' Technical	1	1227	March 27, 2025
How to generate Verifiable Presentation with cert-issuer? Technical	9	138	February 28, 2025
Creating a verifiable certificate page for my students Technical	0	63	February 21, 2025
Why does blockcerts.org not working? Support	0	66	February 15, 2025
How to Securely Verify a Blockcert Credentials? Technical	2	102	January 21, 2025
Can I use email for credentialSubject.id in blockcerts v3? Technical	2	51	January 18, 2025
Am I understanding what really blockcert is about? Part 2 Community	1	71	January 6, 2025
Not able to host certificate on eth testnet(sepolia) due to insufficient balance despite having balance 10x more than required Technical	0	47	December 30, 2024
Blockcerts wallet on Android does not add v3 certificates Technical	6	130	October 21, 2024
How to add custom additional fields - BlockcertValidationError Support	9	2545	October 14, 2024
Best Practices for Implementing Blockcerts in Corporate Training Programs Community	1	88	August 13, 2024
I want help on how to set up educational certification blocks Support	1	122	August 13, 2024
Does Blockcerts supports Off-Chain storage solution?	0	31	August 9, 2024
Adding additional fields (cert-tools) Technical	2	926	August 9, 2024

FAQ - technical issues

AttributeError: ‘CertificateBatchHandler’ object has no attribute ‘certificates_to_issue’ Solution: Error: with cert_issuer -c conf.ini(AttributeError: ‘CertificateBatchHandler’ object has no attribute 'certificates_t…