Best way to check if bank logins are valid

[lev.45450@gmail]

I am wanting to check if bank logins are valid and to check there balances, i dont want to kill the accounts and want to know what is the best way to check them?
I have the IP of the user, i was going to match that as close as possible to a RDP, using the same carrier, state and city if possible, simply log in check what i need and logout
What are your thoughts? Is there a better way to do this?
Thanks I will need to check quite a few, and i think it would be better to use fresh RDP per login...