The most commonly used commercial documents are order notes, debit notes, invoices, and quotations.
Order notes are used to request goods or services from a supplier, while debit notes are used to inform the supplier of any deductions from payment due to errors or damages. Invoices are used to request payment for goods or services provided, and quotations are used to provide information about the cost and details of goods or services requested. These documents are crucial in any commercial transaction as they provide a record of the transaction and serve as evidence in case of any disputes.