If you do not pay a traffic challan in India, it generally remains pending against your vehicle or driving licence. The exact consequences can vary depending on the state and the type of offence.
What can happen if you don't pay?
The challan remains pending
An unpaid e-challan continues to appear in the government traffic system as a pending challan. (Parivahan Sewa)
It may be sent to Virtual Court
Some unpaid challans can be forwarded to the Virtual Court system. The official eChallan portal specifically provides for challans that have been forwarded to Virtual Court.
You may have to deal with court proceedings
If the matter is referred to court, you may need to respond to the case and pay the applicable amount through the court process.
Vehicle or licence-related services can be affected
Depending on applicable state rules and enforcement procedures, pending challans can affect certain transport/RTO services. Government documentation also provides for recommendations to suspend or block a driving licence or registration certificate in appropriate cases.
The problem does not simply disappear
Ignoring a challan is generally not a good idea. The eChallan system maintains offence and payment records, and authorities can access previous violation information.
What should you do?
Check your challan status on the official Government of India eChallan portal and pay it if it is valid. If you believe the challan was issued incorrectly, you can challenge/grieve against it rather than simply ignoring it.
In short: An unpaid traffic challan can remain pending, potentially be referred to court, and may create difficulties with certain vehicle/licence-related processes. The exact consequence depends on the offence and the applicable state rules.