Request for Refund on Undelivered Merchandise is a formal request by a customer to a seller for a refund of the purchase price of an item that was not delivered. The customer may also request an additional refund to cover any additional shipping or delivery costs incurred as a result of the undelivered merchandise. There are two types of Request for Refund on Undelivered Merchandise. The first type is a request for a full refund which includes the purchase price of the undelivered merchandise and any other associated costs. The second type is a request for a partial refund which only includes the purchase price of the undelivered merchandise. The customer should provide evidence of the undelivered merchandise, such as a copy of the purchase order, and any other documents proving the delivery was not received. The customer should also provide detailed contact information and any other relevant information requested by the seller.