1.What is a trade/transfer?
A trade is when the ownership of a domain name changes hands.
A transfer is when the management of a domain name changes hands.
2. What do I need to do when trading/transferring my domain name(s)?
Trade:
If you would like to sell your domain name to another party is up to that party to request a trade. The request is initiated by an accredited registrar who is authorized by the new owner to make the request on his behalf.
Once EURid has received the trade request, 2 emails are issued. One email is sent to the current owner of the domain, and the other email is sent to the future owner of the domain. Both parties then have to confirm (via a link in the email) that they want the trade to proceed. If, after 7 days, neither (or only one) of the parties has confirmed the trade, a new email is sent out to the registrar (which was selected by the future owner to be the manager of the domain he will shortly own) informing him that confirmations are still outstanding. It is then up to the registrar to inform the relevant parties that confirmation is still needed. If, 7 days after the 2nd email was issued, either party has still failed to confirm the trade, the trade is cancelled. If however both parties have confirmed timely the trade is carried out – either 5 – 7 working days after the confirmations have been received or on the future date that was requested by the new owner.
Note:
The new registrar is charged for the execution of a trade and he is only charged if the name is successfully traded.
http://www.eurid.eu/en/general/faq/trades-and-transfers