# Cert-Issuer Help

**URL:** <https://community.blockcerts.org/t/cert-issuer-help/1341>\
**Category:** Support\
**Created:** [September 7, 2018, 5:45pm UTC](https://community.blockcerts.org/t/cert-issuer-help/1341 "2018-09-07T17:45:08Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![AlhaddadM](https://avatars.discourse-cdn.com/v4/letter/a/e99b99/32.png) [@AlhaddadM](https://community.blockcerts.org/u/AlhaddadM)\
**Post date:** [September 7, 2018, 5:45pm UTC](https://community.blockcerts.org/t/cert-issuer-help/1341/1 "2018-09-07T17:45:09Z")

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How to change to testnet mode… and how to generate testnet address…  
the link in the github generate an address start with 1 which is mainnet address .

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**Author:** ![hong215](https://sea2.discourse-cdn.com/flex016/user_avatar/community.blockcerts.org/hong215/32/441_2.png) [@hong215](https://community.blockcerts.org/u/hong215)\
**Post date:** [September 8, 2018, 3:05pm UTC](https://community.blockcerts.org/t/cert-issuer-help/1341/2 "2018-09-08T15:05:22Z")

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you didn’t enable testnet mode in [bitaddress.org](http://bitaddress.org).  
after you go to [bitaddress.org](http://bitaddress.org), then add **?testnet=true** at the end of url, then you will see testnet edition activated.

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<div class="post-metadata">

**Author:** ![AlhaddadM](https://avatars.discourse-cdn.com/v4/letter/a/e99b99/32.png) [@AlhaddadM](https://community.blockcerts.org/u/AlhaddadM)\
**Post date:** [September 8, 2018, 3:15pm UTC](https://community.blockcerts.org/t/cert-issuer-help/1341/3 "2018-09-08T15:15:21Z")

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and now i just put the address in the conf.ini then i run the cert-issuer ?

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<div class="post-metadata">

**Author:** ![AlhaddadM](https://avatars.discourse-cdn.com/v4/letter/a/e99b99/32.png) [@AlhaddadM](https://community.blockcerts.org/u/AlhaddadM)\
**Post date:** [September 9, 2018, 12:51pm UTC](https://community.blockcerts.org/t/cert-issuer-help/1341/4 "2018-09-09T12:51:27Z")

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where should i put the private key to signed the transaction…

 ![Image](https://us1.discourse-cdn.com/flex016/uploads/blockcerts/original/1X/25298630e234a56c658651070bfb76ea8f9bb048.png)

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<div class="post-metadata">

**Author:** ![hong215](https://sea2.discourse-cdn.com/flex016/user_avatar/community.blockcerts.org/hong215/32/441_2.png) [@hong215](https://community.blockcerts.org/u/hong215)\
**Post date:** [September 9, 2018, 9:27pm UTC](https://community.blockcerts.org/t/cert-issuer-help/1341/5 "2018-09-09T21:27:54Z")

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you put your private key in a file and specify the file path and file name in conf.ini

> usb\_name = /directory/path/to/privateKey/file/  
> key\_file = pk\_issuer.txt (file name)