Under Section 22 of the Reserve Bank of India (RBI) Act, 1934, the RBI possesses the sole statutory authority to issue banknotes in India. The single exception rests with the one-rupee note, which is issued directly by the Ministry of Finance, Government of India, but put into circulation exclusively through the RBI network.
Legal Tender Status
Every banknote issued by the RBI is a legal tender throughout India under Section 26(1) of the RBI Act, 1934. Each note constitutes a statutory expression of value guaranteed by the Central Government. Under Section 26(2), the Central Government, on the recommendation of the Central Board of the RBI, reserves the right to declare any series of banknotes of any denomination to cease to be legal tender (the provision utilized during demonetization).
Statutory Backing: The Minimum Reserve System
Since 1957, India has adhered to the Minimum Reserve System for banknote issuance, replacing the older Proportional Reserve System. Under Section 33 of the RBI Act, 1934, the Issue Department of the RBI must maintain a permanent minimum backing assets reserve valued at not less than ₹200 crore at all times.
- Gold Component: A minimum value of ₹115 crore must be held in the form of gold coin or gold bullion.
- Foreign Securities Component: The remaining balance of ₹85 crore can be held in foreign securities, foreign currencies, or Government of India rupee securities.
Institutional Infrastructure: Printing and Minting
Banknote Printing Presses
The production of Indian banknotes is divided equally between two entities: one owned directly by the Government of India and the other by a wholly-owned subsidiary of the RBI.
- Security Printing and Minting Corporation of India Limited (SPMCIL): A wholly-owned Government of India Public Sector Undertaking (PSU). It operates two printing presses:
- Currency Note Press (CNP), Nashik (Maharashtra): Established in 1928; prints standard currency notes.
- Bank Note Press (BNP), Dewas (Madhya Pradesh): Established in 1974; houses an advanced ink factory that manufactures security inks for currency printing.
- Bharatiya Reserve Bank Note Mudran Private Limited (BRBNMPL): A wholly-owned subsidiary of the RBI. It operates two high-security printing presses:
- Mysuru Press (Karnataka): Established in 1996.
- Salboni Press (West Bengal): Established in 1995.
- Varnika Ink Facility: Located at Mysuru, this dedicated facility synthesizes specialized color-shifting and security inks to achieve self-sufficiency in currency materials.
Coin Minting Facility
The minting of coins is governed by the Coinage Act, 2011. The Government of India retains the sole executive authority to design, manufacture, and mint coins of all denominations (ranging from 50 paise up to ₹20 coins). The RBI acts strictly as an agent for the distribution and management of coins received from the government mints.
- Mumbai Mint (Maharashtra): Established in 1829; specializes in commemorative coins, gold refining, and standard circulation coins. Identifying mark: A diamond shape below the year of minting.
- Kolkata Mint (West Bengal): Established in 1757; produces circulation coins and medals. Identifying mark: No mark below the year of minting.
- Hyderabad Mint (Telangana): Established in 1903 by the Nizam; modernized over time. Identifying mark: A star shape below the year of minting.
- Noida Mint (Uttar Pradesh): Established in 1988; the first mint to introduce stainless steel coins in India. Identifying mark: A dot shape below the year of minting.
The Currency Distribution Network
Logistical Architecture
The physical movement of cash from printing presses and mints to commercial markets relies on a hierarchical institutional structure managed by the RBI.
- Currency Chests: These are secure vaults hosted within designated branches of scheduled commercial banks. Legally, the cash stored inside a Currency Chest belongs directly to the RBI, not the host bank. This allows banks to optimize their Cash Reserve Ratio (CRR) calculations by counting only the cash outside the chest as their operational balance.
- Small Coin Depots: Established alongside currency chests, these repositories act as hubs for accumulating and distributing small coins to banks, post offices, and retail trade links.
Clean Note Policy
Introduced formally by the RBI in 1999, the Clean Note Policy aims to ensure that high-quality, clean, and secure banknotes are circulated in the economy, while soiled or mutilated notes are systematically withdrawn.
- Prohibitions: Banks are strictly instructed not to staple banknote packets, write on the watermarked window of currency notes, or expose notes to writing or chemical alterations.
- Soiled vs. Mutilated Notes: Soiled notes are those that have become dirty due to continuous usage or are slightly cut. Mutilated notes are those where a portion is missing or which are composed of more than two pieces. The Reserve Bank of India (Note Refund) Rules govern the exchange value payable for such notes based on the surface area intact.
Reverse Logistics: Disposal and Recycling
When banknotes return to the RBI as unfit for circulation, they undergo rigorous processing at the RBI’s issue offices using Currency Verification and Processing Systems (CVPS).
- Authentication: High-speed machines verify the security features of each note to detect counterfeits.
- Shredding and Briquetting: Genuine but unfit notes are fed into shredding systems. The shredded paper is compressed into solid organic briquettes, which are recycled for industrial use, such as fuel blocks, cardboards, or writing pads, ending the old practice of incinerating bad notes.
Key Security Features of Indian Currency Notes
Mahatma Gandhi (New) Series
Introduced post-2016, the new series of notes downsized the physical dimensions and brought distinct geometric and cultural motifs to check counterfeiting and assist the visually impaired.
| Denomination | Base Color | Reverse Motif | Security & Accessibility Features |
| ₹10 | Chocolate Brown | Sun Temple, Konark | Denomination numeral in Devanagari script; See-through register. |
| ₹20 | Ellora Caves | Ellora Caves | Micro lettering ‘RBI’ and ’20’; Devnagari denomination. |
| ₹50 | Fluorescent Blue | Hampi with Chariot | Windowed demetalised security thread with inscriptions ‘भारत’ and ‘RBI’. |
| ₹100 | Lavender | Rani Ki Vav | Color-shifting windowed security thread (changes green to blue when tilted). |
| ₹200 | Bright Yellow | Sanchi Stupa | Intaglio printing of Mahatma Gandhi portrait; H shape bleed lines for visually impaired. |
| ₹500 | Stone Grey | Red Fort | Intaglio circle identification mark; 5 angular bleed lines on left and right borders. |
Accessibility and Counterfeit Control
- Intaglio Printing: Raised typographic and portrait printing felt easily by touch, applied directly to the Ashoka Pillar emblem, bleed lines, and the central portrait.
- Latent Image: A hidden numeral window located on the band of the note that displays the denomination value only when held flat at a 45-degree angle.
- MANI Mobile App: Mobile Assisted Note Identifier (MANI) developed by the RBI to scan and audio-identify currency denominations for visually challenged citizens without internet dependency.
Essential Trivia and Concepts for UPSC Prelims
High-Denomination Demonetization History
Demonetization has occurred three times in Indian economic history:
- 1946: ₹1,000 and ₹10,000 notes were demonetized by the British administration to curb wartime hoarding.
- 1978: The Morarji Desai government enacted the High Denomination Bank Notes (Demonetisation) Act, invalidating ₹1,000, ₹5,000, and ₹10,000 notes to target black money.
- 2016: The Government of India demonetized the ₹500 and ₹1,000 notes of the old Mahatma Gandhi series on November 8, 2016, to counter counterfeit financing and parallel cash economies.
Maximum Statutory Boundaries
The RBI Act, 1934, caps the maximum denomination that can be printed. Under Section 24, the RBI can issue banknotes up to the maximum denomination of ₹10,000 without amending the principal Act. For coins, the Coinage Act, 2011 permits the government to mint coins up to a maximum denomination of ₹1,000.
Star Series Notes
To maintain strict serial numbering sequence while optimizing printing efficiency, the RBI issues “Star Series” banknotes. If a printed note is found defective during internal inspection, it is replaced at the press with a fresh note carrying the identical serial number prefixed with a Star (*) symbol in the number panel, serving as a verified replacement note of identical legal validity.
Last Modified: May 18, 2026