Final answer:
An invoice from a vendor, a purchase order, and a bank statement are examples of documents that always originate outside your company, such as from suppliers or financial institutions.
Step-by-step explanation:
The document that always originates outside your company is an invoice from a vendor. An invoice is a commercial document issued by a seller to a buyer, relating to a sale transaction and indicating the products, quantities, and agreed prices for products or services the seller had provided the buyer. Another external document is a purchase order, which a buyer issues to a seller, indicating types, quantities, and agreed prices for products or services. Lastly, a bank statement is also an external document served by a bank, summarizing the financial transactions that occurred over a period of time on an account held by the company with that bank.