It is NOT suggested that a CU place a stop or a reversal on a Fiserv ACH debit. 

If a Credit Union places a stop on a Fiserv ACH debit or a reversal of a Fiserv ACH debit, the following will occur:
--The member’s bill pay service will be frozen.
--No pending or recurring payments will be sent from the member’s bill pay.
--The amount of the stopped/reversed payment will become a collection item with the Fiserv Collections Department.
--The member will need to personally call the Fiserv Collections Department at 800-878-1337 to clear the issue.
-- If the stop/reversal is not correctly removed from the member’s credit union account, all future Fiserv ACH debits will be stopped/reversed.

Please contact a CSR with any stop requests, or have the member fill out a payment inquiry from within bill pay.