# Certbot command you use to renew or generate cert by passing my own CSR?

**URL:** <https://community.letsencrypt.org/t/certbot-command-you-use-to-renew-or-generate-cert-by-passing-my-own-csr/124666>\
**Category:** Help\
**Created:** [June 3, 2020, 4:56am UTC](https://community.letsencrypt.org/t/certbot-command-you-use-to-renew-or-generate-cert-by-passing-my-own-csr/124666 "2020-06-03T04:56:02Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![mnordhoff](https://sea3.discourse-cdn.com/letsencrypt/user_avatar/community.letsencrypt.org/mnordhoff/32/22583_2.png) [@mnordhoff](https://community.letsencrypt.org/u/mnordhoff)\
**Post date:** [June 3, 2020, 6:08am UTC](https://community.letsencrypt.org/t/certbot-command-you-use-to-renew-or-generate-cert-by-passing-my-own-csr/124666/3 "2020-06-03T06:08:25Z")

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Why do you want to use an existing CSR?

You can do it, but most of Certbot’s nicest features get disabled when you use a custom CSR.

For best results, you should let Certbot generate keypairs and CSRs itself, or use a different ACME client.

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_[View the full topic](https://community.letsencrypt.org/t/certbot-command-you-use-to-renew-or-generate-cert-by-passing-my-own-csr/124666)._