Service is where strong claims die quietly. The safest mode remains Registered Post with Acknowledgement Due, because the postal receipt and the signed AD card create a presumption of service under Section 27 of the General Clauses Act, 1897. Speed post and reputed couriers with delivery tracking are accepted by most courts as supplementary proof, and email service is increasingly recognised, particularly where the contract designates an email address for notices. Best practice in Indian law firms is to serve by registered post and email simultaneously, then preserve the tracking record and the dispatch register entry.
Jurisdiction deserves a sentence in the notice itself. Under Section 20 CPC, a suit may be filed where the defendant resides or carries on business, or where the cause of action arose; if the contract contains an exclusive jurisdiction clause naming Mumbai, Delhi, Bengaluru or any other seat, the notice should be consistent with it. For commercial disputes of a specified value, the Commercial Courts Act, 2015 routes the matter to dedicated commercial divisions in the High Courts of Bombay, Delhi, Madras and Calcutta and to commercial courts at the district level elsewhere, and the Section 12A mediation requirement applies before institution. Parties in states with high pendency, Uttar Pradesh and Bihar in particular, should weigh the arbitration route at the notice stage itself, since the notice is the natural place to invoke an existing arbitration clause.