A cash acknowledgment is a notice sent to a cash buyer acknowledging receipt of their order. This notice may include an offer inviting the buyer to increase the purchase order and serves to reinforce positive feelings about the purchase and encourage future orders.
On order refers to goods or services that have been requested through a purchase order but have not yet been received or paid for.
A written authorization issued by a buyer to a vendor to supply goods or services at a stipulated price. Upon acceptance by the vendor, the purchase order turns into a legally binding contract.
