The Down Payment Invoice behaves like a regular Invoice. A Down Payment Invoice can be based on a Sales Quotation, a Sales/Purchase Order or a Delivery/Goods Receipt PO in the same way as a regular Invoice; however this will not close the base document.A Down Payment Invoice can be cancelled by a Credit Memo; however this Credit Memo cannot be based on multiple Down Payment Invoices.In addition, this Credit Memo will not affect the warehouse stock or the stock valuation. Note that cash discounts are not available in the Down Payment Invoice.