All,
There appears to be some confusion, so I'll try to clarify.
The (un)confirmed status of a street address is based solely on your card issuer's ability to pass an AVS screen.
Confirming your bank account has NO effect on the confirmation of a street address. Confirming your bank will give you the ability to fund your account or your payments directly from your bank account.
SPP eligibility will not be affected by the existence (or absence) of a confirmed bank account on the PayPal account of the buyer or the seller.
Regards,
Randall
PayPal Consumer Relations