Final answer:
Turnaround documents are those sent to customers or suppliers in a business transaction and returned to the company for confirmation or action.
Step-by-step explanation:
The documents that are sent to customers or suppliers during a business transaction and then returned to the company are known as turnaround documents. These documents often contain information that was first sent by the company and require a response or action from the recipient. Turnaround documents ensure a proper audit trail and verification of transactions. Examples can include invoices, order confirmations, and receipt acknowledgments, which are sent to a buyer and often need to be signed and returned to the seller.