What is required for ticket sales when a payment due is processed onboard?

The requirement for ticket sales when a payment due is processed onboard is to complete passenger information. This is essential because gathering complete passenger information allows for the accurate processing of the ticket and ensures that the correct individual associated with the payment receives the necessary documentation. Having complete details is crucial for record-keeping, communication, and potential follow-up or service issues.

While route details, time of purchase, and payment methods accepted are important aspects of the sales process, they do not directly pertain to the necessary verifications needed for ticket sales onboard. Route details help in understanding the travel path, the time of purchase might aid in tracking transactions, and understanding accepted payment methods is important for the payment process, but none of these fulfill the essential need for accurately identifying and verifying the passenger themselves. Therefore, passenger information stands out as the key requirement in ensuring a seamless ticketing process.