The EPP key (Authorization code) is one of the safeguards against unauthorized transfers of domain name registrations and it protects your rights as a domain owner. The EPP key is required when transferring .com, .net, .org, .biz, .info and .us domain names. It is not possible to initiate a domain name transfer for these domains without an EPP code.
You must always remember that EPP keys are case sensitive.
You can request your EPP Code from your domain registrant. In the case of our customers, you can do so through our Customer Portal.