Presumably you have a membership list. Can you not issue each member an identity number/sequence (eg by email) and catalogue that alongside the membership number.

When a member votes, verify them with the sequence then simply delete them from the db and that should do it.

Unless I'm missing something?

In reply to Re: (z) Insuring Uniqueness on the Internet by jonnyfolk
in thread (z) Insuring Uniqueness on the Internet by zigdon

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