A Failed payment can mean a couple things:
The payment has come into the system (electronically through ERA), but it was unable to connect to a specific Invoice/Claim and therefore did not auto-apply the payment.
The payment was deleted from an Invoice/Claim. In this case, it would need to be re-applied/applied to the correct Invoice/Claim.
Failed payments should be worked daily to make sure money is being applied to the correct Invoice/Claim.
If you do not have an invoice to connect to the failed payment, it is because the claim was not billed through Niko Health and is considered a legacy payment.