Form ADT-3 Filing — Auditor Resignation Under the Companies Act 2013
Section 140(2) Resignation Notice, Casual Vacancy & New Auditor Appointment
Section 140(2) resignation notice, Form ADT-3 preparation and MCA portal filing within the thirty-day window, reasons-for-resignation drafting, casual vacancy analysis under Section 139(8), ADT-1 appointment coordination, and Section 140(3) penalty exposure review — the complete auditor resignation compliance, handled end to end.
Overview
Form ADT-3 Filing for Auditor Resignation
Form ADT-3 is the statutory filing every resigning auditor must make when leaving a company before the natural end of the auditor’s term. Therefore, an auditor resignation is not complete the moment the resignation letter reaches the company — it is complete only when the notice in Form ADT-3 reaches the Registrar of Companies within the prescribed time. We deliver complete Form ADT-3 and auditor resignation advisory at N D Savla & Associates, covering both the outgoing auditor’s filing and the company’s casual vacancy compliance.
Our qualified Chartered Accountants have handled auditor resignation filings across private limited companies, public companies, and one person companies. Furthermore, our team manages the full sequence — resignation letter review, reasons-for-resignation drafting, Form ADT-3 preparation and electronic filing on the MCA portal, casual vacancy analysis under Section 139(8), and coordination of the new auditor’s appointment and Form ADT-1 intimation. Our Form ADT-3 work connects with the wider ROC compliance framework, coordinating with auditor appointment and resignation, Form ADT-1 filing, and company annual filing. As a result, an auditor resignation becomes one clean, gap-free compliance engagement.
At a Glance
Form ADT-3 — Key Facts
A quick reference on who files Form ADT-3, the governing law, and the deadlines that drive the filing.
Definition & Scope
What Is Form ADT-3 Under the Companies Act 2013?
Form ADT-3 is the prescribed electronic form through which a resigning statutory auditor files the notice of resignation with the Registrar of Companies under Section 140(2) of the Companies Act 2013. When an auditor resigns from a company before the completion of the auditor’s term, the Companies Act requires the auditor to formally intimate both the company and the Registrar.
The intimation to the Registrar is made in Form ADT-3, filed on the Ministry of Corporate Affairs portal. The form captures the auditor’s details, the company’s details, the effective date of resignation, and the reasons for the resignation. Importantly, the filing obligation rests on the outgoing auditor — not on the company — and the form must be filed within thirty days from the date of resignation.
Form ADT-3 should not be confused with the company’s own filings. The resignation triggers a casual vacancy in the office of auditor, which the company must then fill under Section 139(8) and intimate to the Registrar in Form ADT-1. Hence, a single resignation sets off a connected chain of filings that must be sequenced correctly.
Common Triggers
When Does Form ADT-3 Filing Become Necessary?
Form ADT-3 is required whenever a statutory auditor leaves office before the natural completion of the term. There are specific situations where the filing obligation arises:
Voluntary Mid-Term Resignation
An auditor steps down before the end of the appointed term due to workload, a change in practice focus, or other professional reasons.
Independence or Disqualification Concern
The auditor identifies a disqualification or an independence conflict under the Companies Act and resigns to remain compliant.
Disagreement With Management
An unresolved disagreement on financial reporting, disclosure, or governance leads the auditor to resign and state the position on record.
Audit Firm Restructuring or Merger
A firm merger, split, or change in registration leads the engagement to move, requiring the outgoing firm to file Form ADT-3.
Change in Group Auditor Policy
A holding company standardises auditors across the group, and the existing auditor of a subsidiary resigns to enable the transition.
Company Transition or Ownership Change
An acquisition, fund investment, or board reconstitution prompts an auditor change, and the outgoing auditor resigns mid-term.
The Company’s Obligation
Casual Vacancy and Section 139(8) New Auditor Appointment
A casual vacancy in the office of auditor arises when the auditor’s office becomes vacant before the natural completion of the auditor’s term. Resignation is one of the principal causes of a casual vacancy. Therefore, when an auditor files Form ADT-3, the company immediately faces a parallel obligation to fill the vacancy under Section 139(8) of the Companies Act 2013.
Where the casual vacancy is caused by the resignation of an auditor, the appointment of the new auditor follows a specific sequence. Our team coordinates each step so the company’s records stay current with the Registrar.
Hence, an auditor resignation is genuinely a two-party event: the outgoing auditor files Form ADT-3, and the company fills the casual vacancy and files Form ADT-1. Where the two filings are not coordinated, the company’s Master Data with the Registrar shows a gap — which can complicate subsequent filings and attract avoidable scrutiny.
Two Different Forms
Form ADT-3 Compared to Form ADT-1
Form ADT-3 and Form ADT-1 are often mentioned together but serve opposite purposes. The table below sets out the key differences so the two filings are not confused.
Our Methodology
Seven-Step Form ADT-3 Filing Process
Our team follows a structured seven-step methodology for every auditor resignation engagement. Therefore, the sequence keeps both the auditor’s ADT-3 filing and the company’s casual vacancy compliance on track.
Resignation Letter Review
We review the resignation letter for date accuracy, the effective date of resignation, and a clear, good-faith statement of reasons — ensuring it matches what will be reported in Form ADT-3.
Effective Date and Deadline Mapping
We fix the date of resignation and map the thirty-day Form ADT-3 deadline from that date, building a clear filing calendar so the cut-off is not missed.
Reasons-for-Resignation Drafting
We help draft an accurate reasons statement — clear enough to satisfy the Registrar, and where the resignation arises from a concern, framed so the auditor’s position is properly on record.
Form ADT-3 Preparation
We prepare Form ADT-3 with the company’s Corporate Identity Number, the auditor’s membership and firm registration numbers, the effective date, and the reasons — cross-checked against the resignation letter.
Digital Signature and MCA Portal Filing
We coordinate the digital signature of the resigning auditor (or a partner of the audit firm) and file Form ADT-3 electronically on the MCA portal within the thirty-day window.
Casual Vacancy and ADT-1 Coordination
We coordinate the company side — the board recommendation to fill the casual vacancy under Section 139(8), member approval at a general meeting, and the new auditor’s Form ADT-1 intimation.
Acknowledgement and Record Closure
We retain the MCA filing acknowledgement, confirm the company’s Master Data reflects the change, and close the engagement with a clean, gap-free compliance record.
Our Services
Our Form ADT-3 and Auditor Resignation Services
Our practice covers both sides of an auditor resignation — the outgoing auditor’s Form ADT-3 filing and the company’s casual vacancy and new-auditor compliance — as one coordinated engagement.
Resignation Letter Review & Reasons Drafting
Companies Act 2013 – Section 140(2)
Form ADT-3 Preparation & MCA Portal Filing
Form ADT-3 – MCA e-Filing
Deadline Tracking & Section 140(3) Penalty Review
Companies Act 2013 – Section 140(3)
Casual Vacancy Analysis Under Section 139(8)
Companies Act 2013 – Section 139(8)
New Auditor Appointment & ADT-1 Coordination
Companies Act 2013 – Section 139, Form ADT-1
Master Data Reconciliation & Record Closure
Registrar of Companies – Master Data
Pitfalls to Avoid
Common Mistakes in Auditor Resignation Filings
Our team has observed the same set of Form ADT-3 mistakes recurring across self-managed resignations. Therefore, sharing this list helps both auditors and companies avoid penalty exposure and compliance gaps.
Missing the Thirty-Day Deadline
Treating the resignation as complete once the letter reaches the company — and overlooking the separate thirty-day Form ADT-3 filing — exposes the auditor to a Section 140(3) penalty.
Assuming the Company Files ADT-3
The Form ADT-3 obligation rests on the outgoing auditor, not the company. Assuming the company will handle it leaves the filing undone and the auditor in default.
Vague Reasons-for-Resignation Statement
An evasive or generic reasons statement can itself attract scrutiny. The reasons must be stated accurately and in good faith, as the filing is part of the public record.
Confusing Form ADT-3 With Form ADT-1
ADT-3 is the auditor’s resignation notice; ADT-1 is the company’s appointment intimation. Filing the wrong form, or only one of the two, leaves a gap in the records.
Leaving the Casual Vacancy Unfilled
Failing to fill the casual vacancy within the Section 139(8) timelines leaves the company without a validly appointed auditor and disrupts subsequent annual filings.
Inconsistent Resignation Dates
A mismatch between the date on the resignation letter and the date entered in Form ADT-3 creates a discrepancy on the record and can invite Registrar queries.
Document Checklist
Documents Required for Form ADT-3 Filing
Speed and accuracy of Form ADT-3 filing depend on document quality. Therefore, our team uses a standardised checklist.
Who We Serve
Who We Serve for Auditor Resignation Compliance
Our Form ADT-3 practice serves both sides of an auditor resignation. Furthermore, we adapt the engagement to the type of company and the circumstances of the resignation.
Why Choose Us
Why Choose N D Savla & Associates
Companies and auditors choose our Form ADT-3 practice for five reasons rooted in real delivery experience. First, a qualified Chartered Accountant with specialised company law and ROC compliance experience reviews every auditor resignation engagement. Second, our team has handled Form ADT-3 filings and casual vacancy appointments across private limited companies, public companies, and one person companies — so the engagement is grounded in practical filing experience.
Third, we handle both sides of the resignation — the outgoing auditor’s Form ADT-3 and the company’s Section 139(8) appointment and Form ADT-1 — so there is no gap on the Registrar’s records. Fourth, we treat the thirty-day deadline as a hard project-management constraint and track it from the date of resignation. Fifth, our practice is based in Mumbai but works with companies and auditors across India through fully remote, MCA-portal-based filing.
Broader Practice
Related Company Law and ROC Compliance Services
Form ADT-3 filing operates inside a wider corporate compliance map. Our complete ROC compliance practice covers:
Frequently Asked Questions
Common Questions on Form ADT-3
What is Form ADT-3 under the Companies Act 2013?
Who is required to file Form ADT-3 and within what time?
What happens if Form ADT-3 is not filed on time?
What is a casual vacancy caused by auditor resignation?
What reasons for resignation must be stated in Form ADT-3?
Is Form ADT-3 the same as Form ADT-1?
What documents are needed to file Form ADT-3?
Need a Form ADT-3 Filing? Talk to Our ROC Compliance Team.
End-to-end auditor resignation compliance — resignation letter review, reasons-for-resignation drafting, Form ADT-3 preparation and MCA portal filing within the thirty-day window, Section 140(3) penalty exposure review, casual vacancy analysis under Section 139(8), new auditor appointment coordination, and Form ADT-1 intimation — all handled under one roof.
