Tell them it is part of your Signature. If that doesn't fly make it your signature for banking purposes. Sign the new Signature Card "Lawful Money" or "Lawful Money Demanded". Then of course you will sign all your checks and withdrawal slips etc. that way. Also, to be fair change all your accounts to non-interest bearing accounts. If they cannot use your funds for fractional lending you should not be profiting by getting interest from them.