You need to post from the other two characters to prove ownership.
B. Before making your thread
- Proof of skillpoint count for the character you are selling must be provided for the auction to be valid. This can be offered in the form of an API verified EVESkillBoard profile. The use of out of date eveboard profiles for character sales is prohibited.
You need the skillboards.
D. Purchasing and sales
- The owner of the character being sold is responsible for paying CCP the character transfer fee.
You have to pay the transfer fee.
Just trying to be helpful before you get locked for breaking those.