Necrocoitus, defined as copulation between a living individual and a dead conspecific, is an extremely rare and poorly understood behaviour in insects. To date, it has been reported only sporadically across a few taxa and is generally regarded as an aberrant mating attempt rather than an adaptive strategy. Here, we document the first confirmed case of necrocoitus in moths. A female Attatha regalis (Moore, 1872) was observed and photographed attempting copulation with a dead male in Namdapha National Park, Arunachal Pradesh, India. This unusual case broadens the taxonomic scope of necrocoitus in insects and highlights the need for further observations to better understand the ecological and behavioural contexts of this phenomenon.