No, you need not be a registered user to post a job on the site. But you need to provide your valid email address.

You can reclaim your password if you have forgotten it. 

Step 1:  

Click "Forgot your password?" link on the Sign In panel and it will display a page to "Create a new Password".

Step 2:  

Fill in your registered email address/mobile number to get the password, and click the"Send Email" button.

Step 3:  

It will display a successful message: "Your password has been changed. An email has been sent as confirmation."

Step 4:  

In the email you receive, click on the "Change Password" link to set your new password. After this, you can sign in and change your password in "Dashboard".