With this plugin you can add any type and any number of attachments to the email correspondence generated by WooCommerce. You also may add additional CC and BCC recipients. To make the recipients aware of the email attachments you can add a notification headline and a notification text at the footer of the email.

Demo : https://woocommerce.com/products/email-attachments/

The Account Funds extension helps build customer loyalty and repeat business by ensuring that your customers spend their funds only on your store! Reward them by giving them exclusive discounts and instant order processing if they pay using their Account Funds.

Demo : https://woocommerce.com/products/account-funds/

YITH WooCommerce Account Funds Premium gives your customers the possibility to deposit funds in your online store now and use them later at any time to proceed with the checkout more quickly.

YITH WooCommerce Deposits and Down Payments allows your customers to make a deposit for the products they want to purchase and to pay the balance only at a later time, either online or in your shop. Giving your customers the possibility to book a room or to confirm a service on demand, like a party room or the reservation for a tour, has never been so easy.