The PIO card and OCI card were documented differently to provide certain benefits and privileges to foreign nationals of Indian origin. But now, these two cards are merged to help applicants enjoy its benefits without getting confused over its benefits. To apply for an OCI card, visit the official website or the Indian mission/consulate in your country. Fill out the online application form accurately, gather required documents (passport, proof of Indian origin, etc.), make the fee payment, and submit the application. Track the status of your application. Once approved, collect the OCI card from the mission/consulate or have it delivered.