Many of the people changing more amount in a day in different bank so government think to put ink in people hands when they exchange their money in bank.
They put ink like vote system. public is against of it . Because they to change their amount in bank more than 2000 rupee but after one time exchange in this system they could not permit to change again .
It's very critical to some black money holders because they using pooe people to changing money via bank.
And some poor people's are allow to use their account to black money holders and they given their account book to some one for 1000 rupee rent. black money holders use poor people account for changing their money white , they giving some money to poor people and they increase poor peoples interest about money.