South Korean capital Seoul has offered to pay around 1 million won (a little more than 900 dollars) to anyone who reports an Uber driver operating without a license in the city.
According to CNET, the move, which appears to be specifically aimed at Uber, requires only that would-be customers inform local officials of the alleged violation, and depending on the severity, the city government will give a cash reward.
Earlier, Uber agreed to suspend services for three months in Portland while officials revised regulations governing taxis and ride-sharing apps.
The taxi company has been facing trouble as taxi consortiums across the world have charged Uber for operating without the required license.
Some have also accused Uber of practicing "illegal" method for handling transactions.