Explanation:

Turnaround document:

A document designed to initiate action and then be returned to use in processing the completion of the transaction is known as a turnaround document i.e., A turnaround document is one which is output from one computerized system and will be the input to another. Examples are optically readable documents, stubs, or punched cards included with customer billings with the request that they be returned with payment.  The turnaround document assists in positive identification and reduces errors because the document with the required feedback information is already prepared, often in machine-readable form.

• Some transaction records are distributed to other departments in the organization to provide background information for recipients in the event that they need to respond to inquiries or need them for other references. With online systems, a reference copy of the transaction can be stored in a computer file and may be retrieved via a terminal by anyone who is authorized and has need of the information.
• Transaction documents may also be used for managerial information or control scanning, as when a purchasing manager scans all purchase orders to spot unusual occurrences. In general, however, managerial information purposes are better met by reports or analyses which summarize transactions. 
• When transactions are processed, a listing of data about each transaction is usually prepared. The listing includes control totals for the number of transactions processed, the total rupees amount of transactions, etc The listing represents a batch of transactions or, for online processing, processing during a period of time It provides a means of processing reference and error control