Panchami land, also known as DC land, was historically assigned to Scheduled Castes in Tamil Nadu under specific conditions. These lands were intended to improve their socio-economic status and generally cannot be sold or re-classified. The Madras High Court has consistently upheld that any alienation or breach of these conditions makes the land liable for government resumption. If you've unknowingly purchased Panchami land, it may be subject to government takeover, and legal recourse is often limited due to these historical restrictions and conditions.