# One-Click Payment

The E-Commerce Payment Gateway (EGW) supports one-click payments, enabling merchants to offer a fast and seamless checkout experience for returning customers across both card payments and account-to-account (A2A) payment methods.<br>

With one-click payments, customer payment credentials or payment details are securely stored using [tokenization](/features/internal-tokenization.md), allowing repeat purchases without requiring customers to re-enter their payment information. This significantly reduces checkout friction and helps merchants improve conversion rates, particularly for businesses with frequent or repeat purchases.<br>

For card transactions, the functionality supports secure card-on-file payments, where card credentials are tokenized and stored in accordance with PCI DSS security standards.

For A2A payments, returning customers can quickly initiate payments using previously selected bank credentials or payment preferences.<br>

The solution is designed to support Strong Customer Authentication (SCA) under PSD2. Where required, 3-D Secure authentication may be applied to card transactions, ensuring secure and compliant payment processing.

By combining strong security, regulatory compliance, and a streamlined checkout experience, EGW one-click payments help merchants enable faster repeat purchases across multiple payment methods.


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