Sources said some influential individuals might have engaged people from slums and nearby areas to get the discontinued currency exchanged.
Kuldeep Kumar, President, Lajpat Nagar Market Association, said that the shopkeepers of the area will not accept Rs 2,000 currency after 12 pm, September 30.
The RBI said 25% of the amount of I-CRR maintained by banks will be released on Saturday and another 25% on September 23.
Data from major banks indicates that out of the total banknotes in Rs 2000 denomination received back from circulation, about 87% is in the form of deposits and the remaining 13% has been exchanged.
Currency in circulation fell from Rs 34.78 lakh crore as on May, 19 when the withdrawal of the country's largest denomination was announced, to Rs 33.24 lakh crore as on July, 28
The apex court said, allowing the exchange of Rs 2000 currency notes is matter of executive policy decision.
Podanur police seized counterfeit currency notes, fake gold bars, rubber stamps, and an air pistol from a house near Vellalore on Monday.