We use a "Resolution of Authority" for all of our Business Accounts (including Sole Props). This document states who can do what on behalf of the entity. Our deposit platform incorporates this "form" in with the other account agreement documents. The authorized signers are also required to be listed and sign the signature card (all CIP procedures are also followed). Prior to having our deposit platform, we used the resolution on the back of the preprinted signature card.
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Opinions expressed here are based upon my experience, strength, and hope.
They are not those of my employer.