I cannot activate my Apple account because I forgot this key-code
I cannot activate my Apple account because I lost this special key or code
iMac, iOS 6.1.4
Apple Event: May 7th at 7 am PT
I cannot activate my Apple account because I lost this special key or code
iMac, iOS 6.1.4
Then that's related to two-step verification. See this -- If you can't sign in with two-step verification using your Apple ID - Apple Support.
What "key-code" are you referring to? Is it related to two-factor authentication or two-step verification?
Recovery key
I cannot activate my Apple account because I forgot this key-code