The most significant connection in Indian Bank's recent history is its formal amalgamation with Allahabad Bank, which was completed in April 2020. This merger essentially integrated the entirety of Allahabad Bank’s operations, branch network, and customer base into the Indian Bank corporate structure. Beyond this historical consolidation, Indian Bank maintains extensive correspondent banking relationships with numerous global financial institutions, enabling it to facilitate international trade, remittances, and cross-border payment processing. These connections allow Indian Bank to maintain a global operational reach despite its primary focus on the domestic Indian market. Customers can also interact with other public sector banks through nationalized infrastructure platforms like the National Electronic Funds Transfer system and the Unified Payments Interface, which link Indian Bank to the entire Indian financial ecosystem, ensuring seamless transactional interoperability for its retail and corporate clients.