Even after two years of demonetisation, the Reserve Bank of India (RBI) on Wednesday said that Rs 10,720 crore of the junked currency has not yet been received by the banks.
When the government banned Rs 500 and Rs 1000 Indian rupee notes with a aim to curb black money, the RBI issued a window to return the currency.
The central bank said that it was estimated that Rs 15.41 lakh crore worth Rs 500 and Rs 1,000 notes were in circulation on November 8, 2016, of which Rs 15.31 lakh crore have been returned.
After the note ban, old junked notes, called specified bank notes (SBNs), were allowed to be deposited in banks with unusual deposits coming under income tax scrutiny.
The "humungous task of processing and verification of specified bank notes (SBNs) was successfully achieved," it said.
The SBNs received were verified, counted and processed in the sophisticated high speed currency verification and processing system (CVPS) for accuracy and genuineness and then shredded, it added.
RBI said the processing of SBNs has since been completed. "The total SBNs returned from circulation is Rs 15,310.73 billion."
A collateral damage as a result of rise in printing and other cost was dividend RBI pays to the government.
The government replaced old Rs 500 notes with new ones, but no replacement for Rs 1,000 notes have been made. Instead, a new Rs 2,000 notes were introduced post note ban.
Post-demonetisation, RBI spent Rs 7,965 crore in 2016-17 on printing new Rs 500 and Rs 2,000 and other denomination notes, more than double the Rs 3,421 crore spent in the previous year.
In 2017-18 (July 2017 to June 2018), it spent another Rs 4,912 crore on printing of currency, the annual report said.
The demonetisation was hailed as a step that would curb black money, corruption and check counterfeit currency but RBI said, "Counterfeit notes detected in SBNs decreased by 59.7 and 59.6 per cent in the denominations of Rs 500 and Rs 1,000, respectively."
"Compared to the previous year, there was an increase of 35 per cent in counterfeit notes detected in the denomination of Rs 100, while there was a noticeable increase of 154.3 per cent in counterfeit notes detected in the denomination of Rs 50," RBI said adding that counterfeit notes detected in the new Rs 500 and Rs 2,000 notes during 2017-18 were 9,892 and 17,929 as against 199 and 638, respectively, during the previous year.