On the Golf NZ website, Click "Play Golf"

Scroll down the page and select "Sign Up" for the Flexiclub membership option that you would like

Enter the the following details, including your previous membership number if you would like to merge scores with a previous membership.

Next, check your email to complete your registration. You will be provided with a membership number. 

You will then be required to enter a few more profile details.

You can then enter in your membership number and the password that you set up.

How to register as a casual golfer