Master Direction on Note Sorting Machines · 02 Oct 2026

RBI/DCM/2026-27/473
DCM(NPD) No.S2154/18.00.014/2026-27

October 02, 2026

The Chairman / Managing Director / Chief Executive Officer
All Banks

Madam / Dear Sir,

Master Direction on Note Sorting Machines

In exercise of the powers conferred under Section 35A and Section 56 of the Banking Regulation Act, 1949, Reserve Bank of India (RBI), from time-to-time issues guidelines / circulars / directives to the banks on Note Sorting Machines.

2. A Master Direction incorporating and updating the extant guidelines / circulars / directives on the subject has been prepared to enable banks to have all current instructions on Note Sorting Machines at one place for reference and the same is enclosed.

3. The previous circulars issued on the subject (Annexed) stand withdrawn from the date of issuance of this Master Direction.

Yours faithfully,

(Sanjeev Prakash)
Chief General Manager-in-Charge

Encl: As above

Table of Contents

1. Introduction
2. Guidelines on Note Authentication and Fitness Sorting Parameters
3. Applicability
4. Authenticity Check
5. Fitness Sorting
   (i) Soiling
   (ii) Limpness
   (iii) Dog-Ears
   (iv) Tears
   (v) Holes
   (vi) Stains
   (vii) Graffiti
   (viii) Crumples / Folds
   (ix) Decolouration
   (x) Repair
6. Mutilated, Imperfect, Mismatched Notes and Built-up Notes
7. Calibration and Periodic Testing of Machines
8. Standards issued by the Bureau of Indian Standards (BIS) for Note Sorting Machines (NSMs)
   Quarterly Test Reporting Format
   Annex

Master Direction on Note Sorting Machines

In exercise of the powers conferred under Section 35A and Section 56 of the Banking Regulation Act, 1949, Reserve Bank of India (RBI) being satisfied that it is necessary and expedient in the public interest to do so, hereby, issues the Directions hereinafter specified.

1. Introduction

Guidelines on installation of Note Sorting Machines (NSMs) for sorting / processing of notes were issued vide circular DCM. No. Cir. NPD.3161/09.39.00 (Policy)/2009-2010 dated November 19, 2009, advising banks that these machines should conform to the standards / parameters prescribed by Reserve Bank of India from time to time. Further, with reference to the draft guidelines on ''Note Authentication and Fitness Sorting Parameters'' published during 2009 (December 23, 2009) and comments received from various stakeholders including banks, equipment manufacturers and members of public in this regard, the final guidelines on ''Note Authentication and Fitness Sorting Parameters'' were issued vide circular DCM(R&D) No.G-26/18.00.14/2009-10 dated May 11, 2010. Subsequently, in the backdrop of introduction of the new series banknotes, these parameters were reviewed, and a revised set of guidelines were issued to banks vide circular DCM(NPD)No. S488/18.00.14/2022-23 dated July 01, 2022.

2. Guidelines on Note Authentication and Fitness Sorting Parameters

2.1 A fit note is a note that is genuine, sufficiently clean to allow its denomination to be readily ascertained and thus suitable for recycling. An unfit note is a note that is not suitable for recycling because of its physical condition or belongs to a series that has been phased out by Reserve Bank of India. All the fitness parameters laid down in this document are to be evaluated individually. A note must pass all the fitness parameters to be considered fit for recycling.

2.2 These parameters provide the minimum standards for cash handling machines used by banks (hereinafter called ‘the machines’). Notes can only be recycled / reissued if they are evaluated as genuine and fit according to these parameters. Authenticity check is a prerequisite for fitness sorting. Fitness sorting can be done only in case of genuine notes. The machines shall be able to identify and segregate suspected counterfeits and notes which are unfit for circulation in terms of these standards in a reliable and consistent manner.

2.3 The Reserve Bank of India phases out certain series of notes from circulation from time to time. These notes, though considered legal tender unless otherwise specified, are unfit for reissue. As and when the Reserve Bank of India decides to phase out a specific series of a specific denomination of notes, the machines shall sort all the phased-out notes as unfit, irrespective of their physical condition.

3. Applicability

These parameters are applicable to machines operated by banks, either directly by their staff or indirectly by their agents. These machines can be of any of the following:

• machines which check the authenticity and fitness of notes, i.e. note processing machines / note sorting machines, and
• machines which check only the authenticity of notes, i.e. note authentication machines and classify the individual notes as either genuine or suspect.

4. Authenticity Check

The machines shall perform authenticity check with reference to the features of genuine notes as disclosed by the Reserve Bank of India from time to time on its website. Any note which is not found to be having all the features of a genuine note shall be classified by the machine as suspect / reject.

5. Fitness Sorting

As a part of fitness sorting, notes with any visual or physical defects are to be sorted as unfit as per the criteria set out in Table 1.

Table 1: Sorting Criteria

(i) Soiling

Soiling refers to the general distribution of dirt across the entire note or in some patterns. It is a measure of the loss of reflectivity from the unprinted areas due to dirt, ageing (yellowing), wear and extraneous markings and includes decolouration due to ageing, excessive folding and other wearing. Soiling increases the optical density and decreases the reflectance of the notes. Notes exceeding the soiling levels set out in Table 2 shall be sorted as unfit. Both the obverse and the reverse of the note shall be checked for soiling.

Table 2: Soiling Levels

(ii) Limpness

Limpness relates to structural deterioration or wear resulting in a marked lack of stiffness in the note paper. Notes with very low stiffness of paper, i.e. with paper which is worn out in circulation or mechanically mutilated shall be sorted as unfit. Detectors for paper quality shall be adapted to the same level as for soiling.

(iii) Dog-Ears

Banknotes with dog-ears with an area of more than 100 mm² and a minimum length of the smaller edge greater than 5 mm shall be sorted as unfit. Chipped notes shall also be sorted as unfit.

(iv) Tears

Notes exhibiting at least one tear at the edge shall be classified as those having tears. Notes with tears larger than those indicated in Table 3 shall be sorted as unfit.

Table 3: Tears