<h1>Undisclosed income detection intensified after demonetisation, prompting search-and-seizure actions and police counterfeit currency seizures.</h1> Income-tax authorities, following demonetisation, executed searches across numerous groups that produced asset seizures and admissions of undisclosed income, combining search-and-seizure operations with assessment follow-up to record concealed income; the cancellation of legal tender also prompted police seizures of suspected fake currency, reflecting coordinated tax and law-enforcement action against black money and counterfeit notes.