Defective show-cause notice invalidates penalty proceedings where service, authentication, and opportunity to respond are absent.

Penalty proceedings under the cited provisions fail where the initiating show-cause notices are not properly served, do not clearly identify the assessee, and lack the required authentication. Such defects deny a lawful opportunity to respond, and a reply from an accountant's office cannot cure the foundational infirmity or substitute for valid notice. As valid service of notice, a real opportunity of hearing, and consideration of the assessee's explanation are conditions precedent to penalty, the penalties were held unsustainable and were cancelled.

---

---

Issues: Whether penalties levied under sections 271(1)(a) and 273(b) could be sustained when the show-cause notices were not properly served and did not adequately specify the assessee or bear the necessary authentication.

Analysis: The notices relied upon for initiating the penalty proceedings were found to be deficient: they did not properly identify the assessee, were not duly signed, and were inadequate to convey a clear and lawful opportunity to meet the proposed action. A reply letter sent from the accountant's office, in the circumstances, could not substitute for valid service of notices or cure the foundational defect in the proceedings. Since penalty can be imposed only after valid notice, a real opportunity of hearing, and consideration of the assessee's explanation, the proceedings were held to suffer from a basic legal infirmity.

Conclusion: The penalties could not be sustained and were cancelled in favour of the assessee.

Ratio Decidendi: A penalty proceeding is invalid where the statutory notice initiating it is not properly served or is otherwise legally defective, because valid service of notice and a real opportunity of hearing are conditions precedent to the levy of penalty.

---