Hi,
Note that reading this
thread
will probably help you :
You can't have a user who already have a user account on your website "guest" checkout with the same email address as the one from his account.
If you keep the "login" option turned on in the configuration, you can have these users login during the checkout so that they can use the account they already have in order to checkout. Or they can use another email address in order to "guest" checkout.
Also, if you want to set a guest checkout, you'll have to :
- Go to the page "Hikashop->System->Checkout"
- Set the "login" option to NO and the "registration" option to "Guest"
The registration option is only available through commercial version of Hikashop.