In order to change your nickname:

  1. Go to My personal data
  2. Change your nickname in the "nickname" field

  3. Click on mceclip1.png at the bottom of the page

This change can only be made once every 90 days.

Tip: you can check whether the chosen nickname is available by clicking on mceclip2.png

Depending on whether or not your nickname is available, the following messages will appear:
mceclip4.png or mceclip3.png

In the latter case, you are invited to enter another nickname.