Karaikudi is situated in the Sivaganga district of Tamil Nadu. It is a greater municipality and the states 20th largest urban agglomeration. It is part of the Chettinad area and has been declared a heritage town by the State Government of Tamil Nadu. Karaikudi is known for its palatial houses that are built with limestone called Karai Veedu. Karaikudi has derived its name from the thorny plant called Karai. It has been referred to in the ancient literature as Kareekudi. The name gradually got modified and modernized into Karaikudi. It was established in the 19th century. The oldest known structure in the area is the Koppudaiya Nayagi Amman Temple. The town of Karaikudi is home to the Nagarathars and the Chettiars who form the business community, the financiers and the trade facilitators. Karaikudi is a rapidly developing urban center. UNESCO has proposed to set up a Chettinad Heritage Museum in the area, recognizing the unique architectural style of the region. Karaikudi is known for its palm leaf baskets woven by the women, known as Chettinad Kottan. Chettinadu Kandangi sarees of Karaikudi are widely popular in the region. The handicraft industry in Karaikudi is indeed a thriving business. Karaikudi is also known for its delectable cuisine. There are many prominent temples in the area that attract tourists. Kundrakudi Shanmuganathan Temple, Ariyakudi Thiruvengamudayan Temple, Pillayarpatti Karpagavinayagar temple, Thirumayam Permual Temple, Kannadasan Mandapam, Kamban Manimandapam, Chettinad Raja Palace and Thousand windows house are the visitor attractions in Karaikudi
The head office of the Tamilnad Bank is at Thoothukudi, Tamil Nadu. The primary objective of founding TMB was to serve the Nadar business community, and the idea was proposed at the annual meeting of Nadar Mahajani Sangam at Tuticorin in 1920. Outside the state of Tamil Nadu, the bank opened its first Indian branch at Bangalore in 1976. On 9 December 1984, the bank opened its first fully computerized branch at WGC Road, Tuticorin. On 11 November 2003, the Bank launched its ATM Card. In e-banking, RTGS/NEFT facilities have been successfully implemented by the TMB bank. The Tamilnad Mercantile Bank had the tie-up with Western Union Money Transfer to facilitate the remittances from abroad to India. For providing payment gateway services to the internet banking customers, TMB bank collaborated with BillDesk (India ideas.com), CCAvenue (Avenues India), SBI ePay, Atom Technologies and PayU India. It was the first old bank to supplying POS machines and introduce mobile banking to Customers. The bank had adopted a video conferencing facility for connecting with the Head Office, various Departments, and Regional offices. For its ATM operations, TMB bank is a member of National Financial Switch. The bank also introduced TMB e-passbook app as a part of its mobile banking operation.