Well, it's definitely not a bug or error report, moving to general questions.
Just make sure to document the trade properly, with screenshots, chat logs ("/savechat") etc. (which you should do anyway when trading accounts), so in case you get banned unrightfully, submit a ticket and show us proof that the accounts do not belong to you anymore.
Changing the email address to something random, such as "lolsold", before selling the account might also prevent your accounts being banned in case the new owner decides to break the rules.
