Form ADT-1 is the company’s notice to the Registrar of Companies about the appointment of its statutory auditor. It is easy to treat ADT-1 as a routine post-AGM form, but the filing only works cleanly when the underlying appointment, auditor eligibility documents, meeting date and ROC notice are aligned. The governing framework is section 139 of the Companies Act, 2013 and Rule 4 of the Companies (Audit and Auditors) Rules, 2014.
The most useful official starting points are the Companies Act, 2013 on India Code and the Companies (Audit and Auditors) Rules, 2014 on India Code. The Act provides the appointment and filing trigger, while Rule 4 sets out the auditor certificate and prescribes Form ADT-1 for the relevant Registrar notice.
What Form ADT-1 actually does
Rule 4(2) of the Companies (Audit and Auditors) Rules states that the notice to the Registrar referred to in the fourth proviso to section 139(1) is to be made in Form ADT-1. The form is therefore a statutory notice of an auditor appointment; it is not the document that creates the auditor’s professional eligibility or replaces the corporate approval by which the appointment is made.
Section 139(1) also makes an important point that is sometimes missed in compliance checklists: for this chapter, appointment includes re-appointment. So a team should not assume that ADT-1 is relevant only when a completely new audit firm replaces the outgoing auditor. The underlying event and the applicable section should be checked each time the auditor is appointed or re-appointed.
The 15-day filing rule
The fourth proviso to section 139(1) requires the company to inform the auditor of the appointment and to file notice of that appointment with the Registrar within fifteen days of the meeting in which the auditor is appointed. This wording matters operationally because the trigger is the appointment meeting, not the date on which the finance team happens to receive the signed consent, not the date on which the minutes are drafted, and not a later internal hand-off to the secretarial team.
A strong compliance calendar therefore records the actual meeting date as the primary trigger. The filing team should prepare the ADT-1 package before the meeting where possible, complete the final meeting-specific particulars immediately after the appointment, and avoid treating the fifteenth day as the working target.
What should be in place before ADT-1 is filed
Rule 4(1) requires the proposed auditor to submit a certificate covering several matters. The certificate must confirm that the individual or firm is eligible and not disqualified under the Companies Act, the Chartered Accountants Act and the related rules or regulations; that the proposed appointment is for the term provided under the Act; that it is within the applicable limits; and that the disclosed list of pending professional-conduct proceedings against the auditor, audit firm or partners is true and correct.
This certificate is more than a formality. It is the compliance bridge between the company’s appointment process and the auditor’s legal eligibility. Before the meeting, the company should also have the auditor’s consent and should ensure that the name, membership number or firm registration number and other identifying particulars are consistent across the consent, eligibility certificate, resolution and the form being prepared.
A practical ADT-1 workflow
- Identify the appointment event. Confirm whether the company is making an appointment or re-appointment under section 139(1), and identify the meeting at which the appointment will legally occur.
- Collect the auditor documents. Obtain the proposed auditor’s consent and the Rule 4(1) eligibility certificate before the appointment is placed for approval.
- Check the appointment record. Ensure the resolution, meeting date, auditor name, category, membership or firm registration details and term are internally consistent.
- Inform the auditor. Section 139(1) expressly requires the company to inform the auditor concerned of the appointment.
- Prepare and file ADT-1. Use the meeting date as the statutory clock and file the notice within the 15-day period prescribed by section 139(1).
- Verify the current MCA form requirements. Before submission, check the live MCA form for current fields, attachments, authentication requirements and portal validations rather than relying on an old internal screenshot or checklist.
- Retain the filing trail. Keep the filed form, acknowledgement or SRN, appointment resolution, consent and eligibility certificate together in the statutory-audit compliance file.
Worked example: why the meeting date controls
Assume a company appoints its statutory auditor at an annual general meeting. The auditor had already given consent and the Rule 4(1) certificate several days earlier. The company’s filing team receives the signed minutes only after the meeting. For the statutory filing clock, the important date remains the meeting at which the auditor was appointed. The earlier consent date does not start the ADT-1 period, and waiting for a later administrative event does not move the statutory trigger.
The practical control is simple: create the ROC task as soon as the meeting concludes, using the appointment meeting date, and attach the final resolution and auditor documents to the same task.
Do not confuse a regular appointment with the first-auditor route
Section 139 contains separate rules for the first auditor. Under section 139(6), the first auditor of a company other than a Government company is appointed by the Board within thirty days from registration; if the Board fails, the members are to appoint the auditor within ninety days at an extraordinary general meeting, and that auditor holds office until the conclusion of the first annual general meeting.
That is a different statutory appointment route from the member appointment framework in section 139(1). A team handling a first-auditor event should therefore verify the current MCA filing instructions applicable to that specific event instead of mechanically applying an AGM checklist designed for a regular appointment or re-appointment.
Common ADT-1 mistakes
- Counting the filing window from the date the auditor’s consent is received instead of the appointment meeting.
- Assuming re-appointment can be ignored because the auditor has not changed.
- Preparing ADT-1 before checking whether the Rule 4(1) eligibility certificate is complete.
- Using inconsistent auditor names, membership numbers or firm registration numbers across the resolution, certificate and form.
- Relying on an old form screenshot without checking the current MCA portal fields and validations.
- Mixing the first-auditor route under section 139(6) with the regular appointment process under section 139(1).
Year-end and AGM checklist for finance and secretarial teams
- Confirm which auditor appointment event is due and the legal approval route.
- Obtain consent and the Rule 4(1) eligibility certificate before approval.
- Cross-check auditor identity and firm details against the resolution and statutory records.
- Record the exact appointment meeting date in the compliance calendar.
- File the ROC notice within the statutory 15-day window where section 139(1) applies.
- Store the filed form and acknowledgement with the appointment papers for audit and secretarial review.
Practical takeaway
ADT-1 is best treated as the final step in a controlled auditor-appointment workflow, not as a standalone MCA form. Start with the correct section 139 appointment route, obtain the auditor’s Rule 4(1) eligibility certificate, make sure the appointment record is internally consistent, and use the actual appointment meeting date to control the 15-day ROC filing window. That sequence prevents the most common problem: a legally valid appointment being followed by a late, inconsistent or poorly documented filing.
