A survey in West Bengal's Matua-dominated assembly seats reveals a high rate of "untraceable" or absent voters following electoral roll revisions. Constituencies like Krishnaganj and Ranaghat Uttar Purba show a significant percentage of deletions attributed to untraceable voters, exceeding deceased or shifted individuals. Researchers note this "unmapping rate" is higher than the state average, highlighting the vulnerability of the Matua community and potential disenfranchisement despite political promises.