Use same email when ordering. Guest checkout

Hi,

That's already the case on your shop as far as I can see. You can already make multiple checkouts at different times using the same email address.
The only restriction is that you can't use an email address from an existing Joomla user account.
So if you have customers with Joomla user accounts on your website, they won't be able to checkout as guests with their email address. You would have to either allow them to login, or delete their Joomla user account if they don't need it.

Hi,

The way the checkout works, we can't allow someone to use an email address of an existing user account. Otherwise, it would create a security issue as anyone with the email address of a user account on your website would be able to access the addresses of that user and other sensetive data that only the user himself should access.

Now, you could try to delete the code:

			if(@$userInDB->user_cms_id) {
				$ret['status'] = false;
				$ret['messages'][] = array(JText::_('EMAIL_ADDRESS_ALREADY_USED'), 'warning');
				$reset_url = JRoute::_('index.php?option=com_users&view=reset');
				$ret['messages'][] = array('<a href="'.$reset_url.'">'.JText::_('PLEASE_CLICK_HERE_TO_RESET_PASSWORD').'</a>', 'warning');
				return $ret;
			}