All you need is:

1) A payment card; 2) To be over 18 years of age; 3) Resident of country offering Afterpay
To see Afterpay's complete terms, visit http://www.afterpay.com/terms

Please note:

If your total order amount exceeds your Afterpay-approved spending limit, your upfront payment may be higher than subsequent payments. Afterpay will show you how the instalments are split before you pay.