Thanks indian. Are you entering your own valid website? If so don`t you need a new one every new voucher? Once you get the voucher, do you send traffic to the same website you applied with, do you send to a website you used a voucher to before? I would assume both of these would raise red flag.
I understand you apply for the vouchers from different ip but do you also make sure you access your adwords account from a different ip that is not linked to the last adwords account?