If you want to transfer your .com, .net, .biz, .us, .org or .info domain, you will need to contact your current registrar and request the domain’s Authorization Code (also referred to as an auth code, Authinfo code or an EPP code). An authorization code is usually a 6- to 16-character code assigned by the registrar. Authorization codes are basically a password for the domain serving as an extra security measure. The auth codes ensure that only a domain owner can make domain name transfers. The Registry requires the Auth Code so for .COM, .NET, .BIZ, .US, .ORG, and .INFO domains you will not be able to continue a transfer until you are able to get the Authorization Code from your current registrar.
If you have a .DE domain name, an Authorization Code is only valid for 30 days once it’s created or changed.