This document discusses source documents and common documents used in accounting for recording transactions in a ledger. Source documents provide evidence that transactions occurred and include bills, invoices, receipts, vouchers, order forms, and cheque stubs. Common documents include invoices, delivery orders, purchase orders, debit notes, credit notes, cheque books, bank pay-in slips, receipts, vouchers, and statements. Statements show the net amount owed by a customer for a given time period such as a month.