Payment on delivery is a payment method that allows customers to pay for their goods upon delivery, rather than prepaying for items before they are shipped. This method is popular in certain regions, offering consumers more flexibility and assurance that they will only pay for items they have received. Payment on delivery is often used in e-commerce transactions, especially in international shipping and cash-on-delivery services. By providing this option, sellers can attract customers who may be wary of online payments or wish to avoid pre-payment risks, though it may require additional logistics and handling.