| 1 | Current valid foreign passport | Self-attested Copy | Primary identity document of the applicant as a foreign national; passport details form the basis of the OCI card |
| 2 | Proof of Indian origin (old Indian passport, or parent's/grandparent's Indian passport or citizenship certificate) | Self-attested Copy | Establishes the applicant's Indian lineage — the link through which eligibility is claimed |
| 3 | Evidence of renunciation or loss of Indian citizenship | Self-attested Copy | Renunciation certificate or copy of foreign citizenship naturalisation order proving Indian citizenship was lawfully given up |
| 4 | Recent passport-size colour photographs (as specified) | Original | Uploaded digitally on the portal; size and background specifications provided on ociservices.gov.in |
| 5 | Marriage certificate (for spouse applicants)(optional)Required only when applying as the spouse of an Indian citizen or OCI card holder | Self-attested Copy | Proves relationship to an Indian citizen or existing OCI holder; required for spousal eligibility route |
| 6 | Birth certificate of the applicant | Self-attested Copy | Establishes date of birth and country of birth, and may help confirm Indian origin through parents |
| 7 | Existing OCI card and old passport (for reissue applications)(optional)Required only for OCI reissue applications | Self-attested Copy | Previous OCI card and the old passport linked to it must be submitted for reissue; both documents are cancelled after the new OCI card is issued |
| 8 | Proof of foreign citizenship / foreign passport of parent (for minor applicants)(optional)Required for minor children applying on parent's OCI/Indian citizenship basis | Self-attested Copy | Establishes parent's eligibility as an OCI holder or Indian citizen when applying for a minor |