The idea of eliminating big bank notes is gaining traction in advanced economies, as governments look for ways to disrupt $2 trillion in illegal money flowing through the global economy every year.
They're opposed to a government decision to void the country's largest-denomination bank notes. The government says the move is designed to combat corruption and target the black market.
The change was announced just hours before it took effect. The prime minister said the move would crack down on the country's expansive black market, which, he said, is used to fund terrorism.
Hillary Clinton's campaign fundraising outpaced Donald Trump's in the first three weeks of October. She enters the home stretch with nearly four times as much cash on hand.