ABN Tech Week trains engineers on the most important issues in building highly scalable software systems. The topic for today is: What is FedNow instant payment system? What’s the impact on Venmo and PayPal?
Federal Reserve launched FedNow instant payment service on 20 Jul. It allows retail clients to send and receive money within seconds and it is available 24×7.
🔹 What does this mean?
1. Peer-to-peer payment services in the private sector like Venmo or PayPal act as intermediaries between banks, so we need to leverage payment schemes for clearing and Fed systems for settlement. However, FedNow can directly settle the transactions in central bank accounts. 
2. Fedwire, another real-time payments system, will still function in large-value or low-value payments. FedNow is not designed to replace Fedwire.
The diagram below shows a comparison between FedNow and ACH (Automated Clearing House), which is used in domestic low-value payments.
🔹 FedNow 
Step 0 – Bob wants to pay Alice $1000.
Step 1 – Bob initiates a payment transaction using FedNow.
Step 2 – The sender’s bank submits a payment message to FedNow.
Step 3 – The FedNow service validates the payment message.
Step 4 – The FedNow service sends the payment message to the receiver’s bank, where it is confirmed.
Step 5 – The receiver’s bank replies to FedNow, confirming that the payment is accepted.
Step 6 – The FedNow service debits and credits the designated accounts of the sender and receiver’s banks.
Step 7 – The FedNow service notifies the sender’s bank and receiver’s bank that the settlement is complete.
Step 8 – The banks debit and credit the bank accounts.
Step 1 – Bob receives authorization from Alice that he can deduct from Alice’s account.
Step 2 – The payment transaction is sent to the receiver’s bank.
Step 3 – The bank collects files in batches and sends them to the ACH operator.
Step 4 – The ACH operator sends the files to the sender’s bank.
Step 5 – The sender’s bank pulls funds from Alice’s account.
Step 6 – Withdrawn funds are sent to the ACH operator.
Step 7 – The ACH operator distributes funds to Bob’s bank.
Step 8 – Bob receives the fund.
Step 9 – The clearing instructions are sent to Fedwire.
Step 10 – Fedwire sends clearing broadcasts to banks for settlements.
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