In electronic payments, does the server authenticate the customer and verify funds with the bank before completion?

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Electronic payments usually work by confirming who you are and checking that funds are available before the merchant completes the charge. At checkout, the system authenticates the customer—verifying identity through credentials, tokens, or other secure methods to ensure it’s really the cardholder. Simultaneously, the payment gateway asks the card issuer to authorize the transaction. The issuer checks that the card is valid, not flagged for fraud, and that enough credit or funds are available. If approval comes back, an authorization is placed (a hold) so the funds are reserved, and the merchant proceeds to finalize the payment. If the authorization is declined, the transaction doesn’t go through. While some specialized or non-card methods can differ, the standard electronic payment flow relies on authentication and bank authorization before completion.