In the Accounts & Privacy tab of the WooCommerce Settings page, you can can control 2 important aspects of the checkout experience:
We recommend that you disable Guest Checkout in your wp2print site. When Guest Checkout is used, your customer cannot see his order history and place re-orders for items he ordered in the past. When Guest Checkout is disabled, customers can see their order history and can easily re-order items they have ordered in the past.
To prevent Guest Checkout, uncheck the checkbox shown below:
If your site is suffering from SPAM registrations, then wp2print has multiple methods that can help prevent or mitigate these SPAM Registrations. Please read about these options to mitigate SPAM registrations.