This is why they need a pitch to hire a company. Instead, they will use purchase orders as documentation. Purchase orders, while technically valid, aren't legally binding. In addition, there are no guarantees that a date will not be changed, so if the event is postponed, there will be no refund. In order to set up a no deposit event, you will need to select a date and select the dining option. In addition, you will want to enter the dollar amount of the event. After you have completed the section, click the preview or email icon to view the invoice. You can then edit the invoice if you need to. You can also send the invoice to your guests.