Sure but AFAIK FedNow is not going to hold funds or authority to payback or revert "fraudulent" transactions?
If I lend out $X dollars but my client says the loan was accessed fraudulently then who pays for this loss? The bank, the payment processor (FedNow/Visa), the customer, or the vendor?
If I lend out $X dollars but my client says the loan was accessed fraudulently then who pays for this loss? The bank, the payment processor (FedNow/Visa), the customer, or the vendor?