Billing Billing enables you to make ad hoc charges to your customers. This is useful for catering or other special events. Create a bill Bill can be created by filling out the billing form. Sending a bill Bills are best sent to your customers using email. Once a bill is saved, there is an option to create an email. You can customize this email and it includes a link to the page your customer needs to fill out to complete payment. Refunding a bill Once a bill is paid, you can refund part or all the amount using the manage site.