Weird because i sold a few here already without having to do that. Since this is the account on the forums and associated with my email that’s registered on the forums.
Doesn’t matter “how” you thing character sales works; I suggest you read CCP’s rules on character sales which are posted here:
Specifically:
Before posting, please be aware that any sales threads posted by characters that are not the character being sold will be locked and/or deleted.
Proof of ownership of the character comes in the form of the character that is being sold making the sales thread in which people can bid for it.