I've added a new Business account and two new Personal accounts in Paypal Developer (the new one), and no funds have been added to the accounts. When I try to use them in my development process by signing in, once I've logged in, Paypal tells me that I need to add a credit card to continue with the payments.
I've also tried confirming the bank account through the sandbox account, and it comes up with the error Sorry - your last action could not be completed
.
I can't complete the debug process without funds in the sandbox account, of course. But nothing I try will put any funds into the test accounts.