Biometrics put mehndi bar on brides

The article discusses how mehndi, a traditional practice during weddings, is causing issues with biometric registration in Bengal. Couples are required to have their thumb impressions recorded twice during the marriage registration process, and mehndi on the fingertips is affecting the capture of fingerprints. Registrars are advising couples to avoid applying mehndi on the left thumb to ensure successful biometric recording. Instances have been reported where marriage registrations had to be delayed due to mehndi on the hands.