An authentication computing device, including a processor in communication with a memory, for authenticating an ACH transaction processed over an ACH network is provided. The processor is programmed to register a payee with the authentication computing device, and to receive an authentication request for an electronic ACH transaction to transfer funds from a payor account to a payee account. The request is received from a first client computing device and includes an account identifier associated with the payor account. The processor is also programmed to transmit an authentication challenge to a second client computing device based on account data associated with the account identifier. The processor is further programmed to receive a response to the authentication challenge, determine whether the account data has been authenticated based on the received challenge response, and transmit an authentication response to the payee based on the determination.
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