Your Auditor Resigned Mid-Year: ADT-3, the 30-Day Clock and Appointing the Next One

The resignation letter usually lands at the worst possible moment. Audit fieldwork is half done, the board meeting is three weeks away, and your statutory auditor writes in to say he is stepping down with immediate effect. What happens next is not a matter of finding a new firm and moving on. The Companies Act, 2013 treats a mid-year resignation as a casual vacancy, and it starts three separate clocks on the same day — one for the outgoing auditor, two for your company. Miss any of them and a routine change of auditor turns into an adjudication file.

Here is the sequence, in the order the law expects it.

The three clocks that start on resignation day

What must happen	Whose job	Deadline	Provision
Statement of reasons in Form ADT-3, filed with the company and the Registrar	The resigning auditor	30 days from the date of resignation	Section 140(2), Rule 8
Board appoints the next auditor to fill the vacancy	Your board of directors	30 days from the vacancy	Section 139(8)(i)
Members approve the Board's appointment at a general meeting	Your shareholders	Within 3 months of the Board's recommendation	Section 139(8)(i)
Form ADT-1 intimating the appointment to the Registrar	Your company	15 days from the general meeting	Section 139(1), Rule 4(2)

Notice the split. The first filing belongs to the auditor who is leaving. The remaining three belong to you. Companies get into trouble when each side assumes the other is handling the whole chain.

ADT-3 is the outgoing auditor's filing, not yours

Section 140(2) puts the first duty squarely on the resigning auditor. Within thirty days from the date of resignation, the auditor must file a statement in the prescribed form with the company and with the Registrar, indicating the reasons for the resignation and any other facts that are relevant to it. Rule 8 of the Companies (Audit and Auditors) Rules, 2014 prescribes that statement as Form ADT-3. If your company is one whose accounts are audited under section 139(5) — a government company and its relatives — the auditor files a copy with the Comptroller and Auditor-General of India as well.

Your company does not file ADT-3. But do not treat that as permission to sit back. Chase it. Get the filed copy with its SRN for your records, and read the reasons actually stated in it. Most resignations are dull — a merger of firms, a capacity problem, a fee disagreement nobody wants to continue. Some are not dull at all. If the outgoing auditor has recorded discomfort about information not received or about something seen in the books, your board should understand that concern properly before a new auditor walks in and inherits the same questions. The ADT-3 is the one document in this whole sequence that explains why the chair fell empty. Read it like it matters, because it does.

What it costs the auditor who skips ADT-3

Section 140(3) penalises the auditor, not the company, when the statement is not filed. The penalty is fifty thousand rupees or an amount equal to the auditor's remuneration, whichever is less. If the failure continues, a further penalty of five hundred rupees runs for each day after the first, subject to a maximum of two lakh rupees.

One warning, because I see this error constantly: a large number of guides and older articles still print the cap as five lakh rupees. That was the position before the Companies (Amendment) Act, 2020 substituted "two lakh rupees" into section 140(3) with effect from 21 December 2020. Adjudication orders being passed today apply the two lakh cap. If a source you are reading shows five lakh — or worse, the old fine-and-imprisonment language — it is quoting a version of the section that no longer exists.

Filling the vacancy: the board has thirty days

Section 139(8)(i) governs what your company does next. In a company whose accounts are not subject to audit by the CAG, any casual vacancy in the office of the auditor is filled by the board of directors within thirty days. A resignation creates exactly this kind of vacancy, so your board meeting to appoint the next auditor should be convened well inside that window — not on day twenty-nine with a notice problem.

Before the board resolves, collect the paperwork that makes the appointment valid:

• The incoming auditor's written consent to act.
• The certificate that the auditor satisfies the eligibility conditions in section 141 and is not disqualified — the appointment is preceded by this consent and certificate under section 139(1) read with Rule 4.
• If your company must have an audit committee under section 177, the committee's recommendation taken into account — section 139(8) appointments, including a casual vacancy filling, are made after considering that recommendation.

Think of it as changing the driver of a bus that is still moving. The passengers cannot be left standing by the road while you interview drivers, the new driver needs a valid licence before he touches the wheel, and the owners of the bus still get the final say on whether he keeps the route. That final say is the next step, and it is the step companies most often forget.

Shareholders must approve within three months

Here is where a resignation vacancy differs from every other casual vacancy. If an auditor dies or becomes disqualified, the board's appointment within thirty days is enough on its own. But section 139(8)(i) adds a condition where the vacancy is the result of a resignation: the appointment must also be approved by the company at a general meeting convened within three months of the recommendation of the board.

Three months. From the board's recommendation, not from the resignation.

In practice this means an extraordinary general meeting for most companies, because the next AGM rarely falls inside the window. Pass an ordinary resolution approving the appointment, and minute the sequence carefully — resignation date, board date, general meeting date — because those three dates are exactly what anyone reviewing the file later will line up against the section.

The auditor so appointed holds office until the conclusion of the next annual general meeting. Read that twice. This is not a fresh five-year term starting early. The replacement auditor steps in to finish the broken year, and at the AGM the members decide the regular appointment — which can be the same firm, appointed for a full term in the usual way, but it has to be decided there.

ADT-1 closes the loop

Once the general meeting approves the appointment, your company informs the auditor of the appointment and files the notice with the Registrar in Form ADT-1 within fifteen days of that meeting. That is the fourth proviso to section 139(1), with Rule 4(2) prescribing the form. If you already have a process for ADT-1 on a normal appointment — our guide to ADT-1 filing on auditor appointment walks through the form itself — the same discipline applies here, except the fifteen days run from the general meeting that approved the casual-vacancy appointment, not from an AGM.

Attach the board resolution, the members' resolution and the auditor's consent and certificate in the manner the form requires, and keep the filed ADT-1 with the filed ADT-3 in one folder. Together they tell the complete story of the change: why the old auditor left, and how the new one arrived.

If yours is a government company, the route changes

Section 139(8)(ii) runs a different track where the company's accounts are subject to audit by the Comptroller and Auditor-General. There, the CAG fills the casual vacancy within thirty days. Only if the CAG does not do so does the board step in, and it gets the next thirty days to fill the vacancy itself. The ADT-3 duty also widens for these companies: the resigning auditor files the statement with the CAG in addition to the company and the Registrar, as section 140(2) itself directs. If that is your company, work to the CAG calendar, not the board calendar described above.

Resignation is not removal — keep the two apart

Founders sometimes ask whether they can simply treat an unwanted auditor as "resigned" and use this faster route. No. Removal is a different animal altogether. Under section 140(1), an auditor can be removed before the expiry of the term only by a special resolution of the company, passed after obtaining the previous approval of the Central Government, and only after the auditor has been given a reasonable opportunity of being heard. There is no Central Government approval and no special resolution in a genuine resignation, because the decision to leave is the auditor's own. The moment the company is the one pushing the auditor out, you are in section 140(1) territory, with its own application and its own timelines. Do not dress one up as the other.

The mistakes I see in resignation files

The board appoints, and nobody calls the general meeting. The three-month member approval is specific to resignation vacancies, which is precisely why it gets missed — teams reuse the death-or-disqualification checklist, where no such approval is needed.

ADT-1 filed off the board date. In a resignation vacancy, the appointment the Registrar is being told about is the one the members approved. The fifteen days run from the general meeting.

Nobody collected the ADT-3. It is the auditor's filing, but its absence lands in your lap at diligence time, when an investor's counsel asks why the auditor changed mid-year and your file has no answer.

The new auditor is promised a five-year term in the board minutes. He does not have one. He holds office till the conclusion of the next AGM, and the minutes should say exactly that.

The vacancy is left open into audit season. Without an auditor in office, the audit cannot close, the board cannot adopt audited statements, and the AGM machinery behind your AOC-4 and MGT-7 has nothing to stand on. A resignation in June is an inconvenience. The same vacancy still open in September is a crisis.

Run the sequence, in order

A mid-year resignation feels personal. The law treats it as paperwork with clocks. The outgoing auditor states his reasons in ADT-3 within thirty days. Your board appoints within thirty days. Your members approve within three months. ADT-1 follows within fifteen days of that meeting. Do those four things in that order, keep both filed forms together, and the change of auditor becomes a closed chapter instead of an open default. If the resignation has already landed and the thirty-day board window is running, our annual filing of company team handles the full sequence — board and general meeting paperwork, ADT-1, and the season's AOC-4 and MGT-7 behind it — so the vacancy is closed properly and on time.