- ACH for Frontline Staff will be the topic of an April 14 webinar being hosted by CUNA. The session will focus on the basics of Automated Clearinghouse (ACH) and will help provide frontline staff with tools that will help answer questions such as the difference between a stop payment, authorization revoked and unauthorized transactions. The training is ideal for tellers and teller supervisors, all retail and member service personnel. The webinar will be held from 2-3 pm. (ET) and is priced at $219 for affiliated CUNA members.