Hi,
Like Nicolas wrote, you can put such restriction on the payment methods and also on the shipping methods.
An order can't be completed without a payment method and can't be complete without a shipping method (if you put the option to force the shipping regardless of the weight).
If with these two elements it is still not working, we will need details about your configuration:
- configuration of your payment method
- configuration of your shipping methods (listing)
- your checkout workflow configuration
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.