1. Open the ticket stub app and click "My ETC";
2. Enter the account and password and click "Login";
3. After logging in, click "I want to invoice";
4. Select the license plate number and header information to be invoiced;
5. Select the invoicing itinerary, click "Go to invoicing" and then click "Next";
6. Fill in the email address of this electronic invoice, and then click "Confirm Invoicing".
ETC refers to automatic toll collection of expressway or bridge. Through the special short-range communication between the on-board electronic tag installed on the windshield of the vehicle and the microwave antenna on the toll station, ETC and lane, and the use of computer networking technology to carry out background settlement processing with the bank, so as to achieve the purpose of paying the highway or bridge fees when the vehicle passes through the highway or bridge toll station without parking.