After entering the information required for registering you will need to activate your Osta.ee user account.
This is very easy - after registering you will receive an e-mail (to the address you indicated when registering) with a link, and clicking on that link will activate your account and you can log in with your user name and password!
If you registered as private company, you will not receive the link - corporate accounts are activated by Osta.ee within 24h (except for weekends and public holidays) and then you will receive relevant message by e-mail.
If you wish to start active selling and buying immediately, you will also have to pass authentication.
If you have accidentally not activated your user account, click on "Activate" (near the beginning of registration) and enter your user name. In a moment a new activation link will be sent to the e-mail address associated with your user account. So be sure to check whether you have entered correct e-mail address, otherwise the e-mail with activation link will end up in wrong mailbox!