Indirect Vote
This vote cannot be used directly, but can be assigned to an registered not-for-profit organsation, including potentially a political party, that uses the voting power as decided by the governance of the organisation, thus rendering the identity of the vote holder anonymous.
For verification purposes it might be a reasonable requirement that you must be a member of, or a donor to, the organisation that you give your voting power to. You may give your vote to only one organisation at a time. You may transfer it to an another organisation or just revoke it. The Burden of proof on the right to use a vote is mostly on the organisation in question.