1. Post-paid users who have signed contracts with banks will be blacklisted when the balance on their cards is insufficient to pay the tolls.

2. Prepaid users who sign contracts with banks or recharge customers who directly handle at ETC outlets have negative account balances and are blacklisted.

Generally speaking, there is no money in your ETC card, so you have to recharge it. Before using ETC, be sure to check whether the balance is enough to use the toll. If you can't cross the ETC channel and there is a car behind you, it will be very troublesome.

Extended data:

The recharge of ETC is very convenient at present, and it can be recharged directly in Alipay:

1. Open Alipay, find more on the home page, and click in.

2. Find urban services in more places.

3. Find ETC and open one.

4. I clicked on Luqiao ETC, and after I went in, I just clicked on the recharge payment.