Make sure you are logged in.
Go to Account Settings.
In there, go to Member Profiles.
Choose Deactivate Account and confirm to complete the process.
If you can't find any contact info and still wish to ask something, for example a question about what exactly is deleted, about data retention, etc., you may contact the domain owners using this info.
If you signed up for Alibaba using a third-party login such as Facebook or Twitter, you probably want to revoke all access from Alibaba. Click the icon below to find out how.