A Letter Cancelling Unfilled Order is a formal document used to communicate to a vendor or supplier that an order previously placed has been officially cancelled. It is important that this letter is sent to the vendor in a timely manner to ensure the order is not fulfilled. There are two main types of Letter Cancelling Unfilled Order: Standard Cancellation Letter and Request for Cancellation Letter. A Standard Cancellation Letter is used to cancel an order that was not fully filled. This letter should include the order number, date of order, name of vendor, name of customer, and any other relevant information. The letter should also explain the reason for the cancellation and thank the vendor for their services. A Request for Cancellation Letter is sent when the customer wishes to cancel an order that has not yet been fulfilled. This letter should include the order number, date of order, name of vendor, name of customer, and any other relevant information. The letter should also explain the reason for the cancellation and request that the vendor confirm the cancellation in writing. Both types of Letter Cancelling Unfilled Order should be written in a professional and courteous tone. It is important to ensure that the letter is clear and concise to avoid any misunderstanding or confusion.