While tipping the courier is not mandatory, customers can do so when you deliver the order.
Please note that tipping a courier from the app is not possible at the moment. If the customer wants to leave you a tip, they can do so by giving you cash. The tip you receive will not appear in your Delivery History.
Note: If the customer pays for the order in cash, always confirm if they would like to receive the difference back as change. If yes, follow the steps in the customer paid more cash article.