Electronic Payment Systems (EPS) are an essential component of E-Commerce because they enable buyers and sellers to transfer money electronically for goods and services purchased through digital platforms. In traditional commerce, payments are generally made through cash, cheques, or physical banking transactions. In contrast, E-Commerce depends heavily on electronic methods that allow customers to make payments remotely through computers, smartphones, cards, bank accounts, and digital wallets. EPS therefore provides the financial infrastructure required for online transactions and supports the growth of digital business. An Electronic Payment System can be defined as a mechanism through which payment information is transmitted and financial transactions are completed electronically between a customer, merchant, bank, payment service provider, and other participating institutions. When a customer purchases a product from an online store, the payment system verifies the customer's payment details, authenticates the transaction, obtains authorization from the relevant financial institution, and transfers or confirms the payment to the merchant. The entire process can take place within a few seconds. Electronic payment systems perform several important functions in E-Commerce. The first is payment initiation. Customers can select a suitable payment method during checkout and provide the necessary information or authorization. The second is authentication, which ensures that the person initiating the transaction is authorized to use the selected payment account. The third is authorization, where the bank or payment provider checks whether the transaction can be approved. The fourth is transaction processing and settlement, through which funds are transferred between the customer's and merchant's financial institutions. EPS also provides transaction records that help customers and businesses monitor payments and resolve disputes. Credit and debit cards are among the oldest and most widely used electronic payment methods in E-Commerce. A customer can enter card details on a secure payment page and complete the purchase after authentication. Debit cards deduct money directly from the customer's bank account, whereas credit cards provide a credit facility up to an approved limit. Card payments are convenient and widely accepted, although security measures such as encryption, tokenization, and additional authentication are required to reduce fraud. Internet banking is another important electronic payment method. Customers can pay merchants by transferring funds directly from their bank accounts through online banking facilities. The customer is redirected to the bank's secure platform, logs in, verifies the transaction, and authorizes the payment. Internet banking is particularly useful for customers who prefer to make payments without using cards. In India, online banking is integrated with many E-Commerce platforms and digital payment services. Digital wallets or electronic wallets allow customers to store payment credentials or money electronically and use them for online purchases. A digital wallet can be linked to a bank account, debit card, credit card, or other payment source. Customers generally authenticate themselves through passwords, PINs, biometric identification, or one-time passwords. Digital wallets simplify the checkout process and can also support refunds, loyalty programmes, and transaction histories. Mobile payments have become an important part of E-Commerce because smartphones provide convenient access to financial services. Customers can use mobile applications to pay for products and services without relying on cash. Mobile payment systems may use bank accounts, cards, wallets, QR codes, or other technologies. They are especially