A supplier who needs to make additional charges for goods delivered will send

A supplier who needs to make additional charges for goods delivered will send a "debit note". A debit note is a document used to notify a customer that they owe money to a supplier due to an underpayment, additional charges, or an error in a previous invoice. It is essentially the opposite of a credit note, which is used to notify a customer of a refund or credit to their account. Therefore, when a supplier needs to charge additional costs, they will send a debit note to the customer to request payment for the difference.