Yes, you can set up a recurring payment from another financial institution. If the payment will be coming from an account you have with Fitzsimons, you can set that up on the Online Banking Portal and you do not need to use the payment portal.
Beware of scams: scams of all kinds have been on the rise, especially those involving Amazon. Remember to keep your account and information safe
Never give personal information and only send money to people you know (Amazon will never ask you to provide payment over the phone or zelle)