Most businesses use the same sorts of information on invoices: contact information, sequential invoice numbers, etc. Because of the unique nature of freelance work compared to other businesses, especially for freelance invoices, it should be adapted to reflect these differences.
As a vendor, you can provide this purchase order template to your customers to make placing orders easy. Or, if you have a small to medium size business that frequently orders from suppliers, using a template can save time and reduce the need for complicated and costly invoice software. A purchase order number is included for tracking orders, and special instructions can be included at the bottom of the page