How to edit/change Required/Not Required checkout fields in OpenCart
- Log into your Admin panel and go to System >> Localization >> Countries.
- Click on the edit button in front of the Country that you wish to alter, in our example we will use Argentina.
- On the next page, you will see Postcode Required option. Set it to No or Yes.
- Note that this will work for a Register Account and for Guest Checkout options.
- Save your changes and check your site.