# Cert Verifier- Verification Error **URL:** \ **Category:** Technical\ **Created:** [March 13, 2020, 5:17am UTC](https://community.blockcerts.org/t/cert-verifier-verification-error/2403 "2020-03-13T05:17:44Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![cisdev512](https://avatars.discourse-cdn.com/v4/letter/c/22d042/32.png) [@cisdev512](https://community.blockcerts.org/u/cisdev512)\ **Post date:** [March 13, 2020, 5:17am UTC](https://community.blockcerts.org/t/cert-verifier-verification-error/2403/1 "2020-03-13T05:17:44Z")
Hello, I am using cert-issuer since past few days so I was able to issue the certificate on testnet bitcoin using sample unsigned certificates available at this path **“examples/data-testnet/unsigned\_certificates”** I am doing this by REST so it gives me some output when I take that output and try to pass it in cert verifier for the verification I got this output ERROR:root: Verification step VerificationGroup failed! ERROR:root: Verification step VerificationGroup failed! Checking certificate has not been tampered with, failed Checking certificate has not expired,not\_started Checking not revoked by issuer,not\_started Checking authenticity,not\_started Validation,failed But if I pass the sample signed certificate located here **/cert-verifier/tests/data/2.0/testnet.json** it worked well see the below output Checking certificate has not been tampered with,passed Checking certificate has not expired,passed Checking not revoked by issuer,passed Validation,mock\_passed So I am not sure what I am doing wrong, the first thing which came in mind after doing some research is I am using an unsigned certificate which has a different public key and I am signing them from my testnet wallet address so cert verifier is not able to cross-check the transaction ID for public key and wallet address. I am not sure whether it is true or not, but if it is true then what should I do? Thanks in advance.