Complaint Registration Number
Also written CRN
The unique number generated the moment an RTA registers an investor complaint, sent to the complainant's email and mobile — the entry point into a grievance process with fixed timelines up to arbitration.
In plain language
The moment an investor's complaint is logged with an RTA, it is not left to float around as an email in an inbox. It is given a Complaint Registration Number, and that number is sent straight to the complainant's email and mobile.
From there, the RTA is expected to redress the grievance promptly, and keep a full record of every complaint it receives and how it was resolved.
How it works
To help the RTA resolve a complaint effectively, investors are asked for their name, PAN, Aadhaar number (optional), the company name(s) in which securities are held, DP ID and Client ID or physical folio number(s), address, contact numbers and email ID.
RTAs must disclose complaint data on their own websites — complaints received against them, and their redressal status — by the 7th of the succeeding month, in a prescribed format.
If the RTA does not resolve the complaint in time, the investor has an escalation path with its own clock:
| Stage | Timeline |
|---|---|
| Initial complaint (RTA / SCORES) | Redressed no later than 21 days from receipt |
| Escalation via SMARTODR | Within 21 days of the unresolved complaint |
| Conciliation | 21 days, extendable by 10 days with consent of both parties |
| Arbitration | 30 days, extendable by a further 30 days with consent of the parties |
Beyond arbitration, an aggrieved party may appeal to an appellate panel of arbitrators, and finally to the High Court.
A worked example
Mrs. Rane emails a complaint about a delayed dividend payment to Konkan Pharma Ltd's RTA on 3 March. The RTA registers it the same day and issues Complaint Registration Number KP-2026-00417, sent to her phone and email.
The RTA fails to resolve it within the 21-day window (by 24 March). Mrs. Rane escalates through SMARTODR. Conciliation begins and runs its standard 21 days, then both parties agree to a 10-day extension to firm up the settlement terms — concluding by roughly 5 May. Had conciliation failed entirely, the dispute would have gone to arbitration, itself bounded by 30 days, extendable by a further 30 with consent — a process that could, in the worst case, run past three months from her original complaint.
Why NISM asks about it
Chapter 15, section 15.4.3 (Emphasize on Effective Resolution of Investor Grievances) and Table 15.1. Expect the 21-day initial redressal timeline, the 7th of the succeeding month disclosure deadline, and the escalation ladder — SCORES/RTA, then SMARTODR, then conciliation (21+10 days), then arbitration (30+30 days).
Common exam traps
- 21 days is the baseline redressal clock at multiple stages (initial complaint and SMARTODR escalation) — do not assume it is a single, one-time deadline.
- Conciliation and arbitration have different base periods and different extensions — 21+10 for conciliation, 30+30 for arbitration. Swapping them is a common error.
- Aadhaar number is explicitly optional in the information sought from a complainant — PAN is not.
- The Complaint Registration Number is issued on registration, not on resolution — it identifies the complaint, not the outcome.
Where this is taught
Free preparation for NISM Series II-ARelated terms
- Investor Education and Protection FundThe government fund that takes in dividends, deposits and shares left unclaimed for seven years, spends the income on investor education, and refunds the rightful owner whenever they finally claim.
- Maker and checkerThe internal control an RTA follows so that no single employee both processes and approves a document — one person (the maker) enters a request, and a second (the checker) verifies it before it takes effect.
- Qualified RTAA registrar servicing more than two crore folios — treated by SEBI as a Critical Infrastructure Institution and held to enhanced monitoring, reporting and business continuity requirements.
- E-votingCasting a shareholder vote electronically instead of by postal ballot — the RTA sets up the platform, sends notices 25 days ahead by post or 21 by email, and closes the voting site at 5 p.m. the day before the AGM.