Overview
Authorization codes, usually referred to as auth-codes, are mainly used to authenticate the validity of domain transfers.
Their function, use, and management are highly dependent on the TLD in question, so when in doubt, please consult the TLD's article in our Knowledge Base: https://kb.centralnicreseller.com/domains/tlds
For Domain Owners — How Can I Get My Domain's Auth-Code?
If you are a domain owner and need to get hold of your domain's auth-code, please contact your responsible reseller, they will assist you. If you're not sure who your reseller is: It's usually the company you pay the bills to for the domain's registration and renewal.