# Verifying certificates on Testnet

**URL:** <https://community.blockcerts.org/t/verifying-certificates-on-testnet/533>\
**Category:** Support\
**Created:** [November 13, 2017, 8:31am UTC](https://community.blockcerts.org/t/verifying-certificates-on-testnet/533 "2017-11-13T08:31:43Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![d.hussain](https://avatars.discourse-cdn.com/v4/letter/d/4af34b/32.png) [@d.hussain](https://community.blockcerts.org/u/d.hussain)\
**Post date:** [November 13, 2017, 8:31am UTC](https://community.blockcerts.org/t/verifying-certificates-on-testnet/533/1 "2017-11-13T08:31:43Z")

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Hi,

I have created on certificate on test block chain however I am unable to verify this using certviewer application getting beloow error

 ![error_certviewer](https://us1.discourse-cdn.com/flex016/uploads/blockcerts/original/1X/7760f4779b9340eddfe12695750fc301f93abe01.png)

On mobile app I am getting different error i.e.

Error  
This doesnt appear to be a valid Issuer. Please check the URL and try again.

Regards,  
Danish