Which method of payment is accepted when the device is offline?

When a payment device is offline, it typically indicates that there is a lack of connectivity for processing transactions. In this scenario, the device cannot verify payments or authorize transactions through electronic means, which makes it impossible to accept credit card payments, digital payment apps, or any other electronic forms of payment that require an internet connection or an active server link.

The correct answer notes that there is an inability to collect fares in such a situation. This implies that without the necessary working technology to process transactions, passengers cannot make payments, thereby preventing fare collection entirely. This scenario is important for understanding operational limitations during technical outages in transit systems and highlights the importance of having systems in place for cash payment when technology fails.