How do I make cash deposits? Talk to us Phone us Breadcrumbs Firefighters Mutual Bank Help Centre Banking Help How do I make cash deposits? Hi how can we help you? This is the label? Submit help search How do I make cash deposits? There are three ways you can deposit cash with us: At a local Post Office, using Bank@Post. Take your cash and your card to the Post Office, the staff will swipe your card and deposit the funds in to the S1 Everyday account. You are also able to use the National Australia Bank to deposit cash, as long as you have an encoded deposit slip to accompany your deposit. At a local office. Some offices allow members to make cash deposits, find the nearest one to you which offers this service. Back to top.