Indian Overseas Bank (IOB) is a central public sector undertaking. It is under the ownership of the Ministry of Finance, Government of India. It is based in Tamil Nadu, India, with about 3,214 domestic branches, about 4 foreign branches and representative office. Founded in February 1937 by M. Ct. M. Chidambaram Chettyar with twin objectives of specialising in foreign exchange business and overseas banking, it has created various milestones in Indian Banking Sector. During the nationalisation, IOB was one of the 14 major banks taken over by the government of India. On 5 December 2021, IOB got Degidhan Award 2020–21 by Ministry of Electronics & Information Technology for achieving second highest percentage of digital payment transaction among public sector banks. As on 31 March 2022, IOB's total business stands at ₹417,960 crore (US$52 billion).

Tamil Nadu (; Tamil: [ˈtamiɻ ˈnaːɽɯ] (listen), abbr. TN) is a state in southern India. It is the tenth largest Indian state by area and the sixth largest by population. Its capital and largest city is Chennai. Tamil Nadu is the home of the Tamil people, whose Tamil language—one of the longest surviving classical languages in the world—is widely spoken in the state and serves as its official language. The state lies in the southernmost part of the Indian peninsula, and is bordered by the Indian union territory of Puducherry and the states of Kerala, Karnataka, and Andhra Pradesh, as well as an international maritime border with Sri Lanka. It is bounded by the Western Ghats in the west, the Eastern Ghats in the north, the Bay of Bengal in the east, the Gulf of Mannar and Palk Strait to the south-east, and the Indian Ocean in the south. The at-large Tamilakam region that has been inhabited by Tamils was under several regimes, such as the Sangam era rulers of the Chera, Chola, and Pandya clans, the Pallava dynasty, and the later Vijayanagara Empire, all of which shaped the state's cuisine, culture, and architecture. After the fall of the Kingdom of Mysore, the British colonised the region and administered it as part of the Madras Presidency, headquartered at the city of Madras, now known as Chennai. After India's Independence in 1947, the Madras State came into existence, whose borders were linguistically redrawn by the States Reorganisation Act, 1956, losing territory to Kerala, Karnataka and Andhra Pradesh. The state was renamed as Tamil Nadu in 1969. It is home to a number of historic buildings, multi-religious pilgrimage sites, hill stations and three World Heritage Sites.The economy of Tamil Nadu is the second-largest in India, with a gross state domestic product (GSDP) of ₹24.85 lakh crore (US$310 billion) and has the country's 11th-highest GSDP per capita of ₹225,106 (US$2,800). It ranks 11th among all Indian states in human development index. Tamil Nadu is the most urbanised state in India, and one of the most industrialised states; the manufacturing sector accounts for more than one-third of the state's GDP. Its tourism industry is the largest among the Indian states. The Tamil film industry plays an influential role in the state's popular culture.

Thoothukudi (formerly Tuticorin) is a port city, a municipal corporation and an industrial city in Thoothukudi district in the Indian state of Tamil Nadu. The city lies in the Coromandel Coast of Bay of Bengal. Thoothukudi is the capital and headquarters of Thoothukudi district. It is located about 590 kilometres (367 miles) southwest of Chennai, 190 kilometres (118 miles) northeast of Thiruvananthapuram and 580 kilometres (360 miles) southeast of Bangalore. According to Confederation of Indian Industry, Thoothukudi has the second highest Human Development Index in Tamil Nadu next to Chennai. Thoothukudi City serves as the headquarters of Tamilnad Mercantile Bank Limited. Major educational establishments in the city include Government Thoothukudi Medical College, Fisheries College and Research Institute, Tamil Nadu Maritime Academy, V.O. Chidambaram College, Kamaraj College, Anna University (Thoothukudi Campus) and Government Polytechnic College. V. O. Chidambaranar Port Trust is one of the fastest growing Major Ports in India. Thoothukudi is an "Emerging Energy and Industrial hub of South India".Thoothukudi is known as "Pearl City" due to the pearl fishing carried out in the town. It is a commercial seaport which serves the inland cities of Southern India and is one of the sea gateways of Tamil Nadu. It is also one of the major seaports in India with a history dating back to the 6th century CE. The city is believed to be of significant antiquity and has been ruled, at different times, by the Early Pandyas, Medieval Cholas, Later Cholas, Later Pandyas, Ma'bar Sultanate, Tirunelveli Sultanate, Vijayanagar Empire, Madurai Nayaks, Chanda Sahib, Carnatic kingdom, Portuguese, Dutch and the British. Thoothukudi was settled by the Portuguese, Dutch and later by the British East India Company. The city is administered by a Thoothukudi Municipal Corporation covering an area of 353.07 km2 (136.32 sq mi) and had a population of 237,830 in 2011. The urban agglomeration had a population of 410,760 as of 2011.The majority of the people of the city are employed in salt pans, sea-borne trading, fishing, and tourism. The 21 islands between Thoothukudi and Rameswaram shores in the Gulf of Mannar are noted as the first Marine Biosphere Reserve of India, and have around 36,000 species of flora and fauna. This protected area is called Gulf of Mannar Marine National Park. Our Lady of Snows Basilica festival is celebrated annually during August. This and the Shiva temple festivals, including Adi Amavasai, Sasti, and Chittirai chariot festivals, are the major festivals of the area. Roadways are the major mode of transport to Thoothukudi, while the city also has rail, air, and sea transport.