I think the majority of the voter fraud in US would occur if the following 3 gates are not enforced a) eligible to vote b) voted only once c) it is the person

I think the majority of the voter fraud in US would occur if the following 3 gates are not enforced a) eligible to vote b) voted only once c) it is the person that voted and not his/her proxy. It would be much better to use some biometric, verified by 3 independently developed databases. As those would be hard hard to fake