Verification of Identity for Ballots and Votation in an area of circunscription (cities, terrirories, ..)

Hox to check and valid Identities and dispatching them on specific area. It is very difficult to be certain of the identity with the actual way to do it. As the identity documents are not saved, one can make multi signup with the same document. We suggest to create a group of reflexion about it and see what can be done. It's corelate to implement different types of voting