I just want to confirm that one of my brother is also using fiverr so can we register our fiverr accounts with 1 payoneer card for payment
You are not allowed to do this. Each account must have a separate payment method.
Check the Terms of Service at the bottom of the Fiverr main page.
Both accounts are likely to be banned.
i want to add another payoneer bank card to this one and want to remove the previous one
please can you guide me