In France, electronic voting machines are used in approximately 2 % of voting stationswhile the voters of the rest of the country still vote with ballot papers. We decided tofocus on this small proportion to check whether the electronic voting machines in use inFrance could pose a problem to voting efficiency and reliability. We compared theaccuracy of the voting process by checking whether the number of votes to signatureswere equal in each polling station. We found that the gaps between votes and signatureswere, on average, four to six times higher when electronic voting machines were usedby comparison with polling stations where people votes with ballot papers. We discusssome hypotheses to explain this gap.