Can I still use IIC for the charity part if I already know what broker I want to use? A Can I still use IIC for the charity part if I already know what broker I want to use? Yes! As long as you invite us to contact that broker on your behalf before you sign-up with that broker. Is my choice of brokers limited to the ones that are participating in IIC and want to be charitable? How often do brokers pay referral fees.