A POI document is a Proof of Identity document that contains the name and photograph of the resident. It is required for various purposes such as Aadhaar enrolment, updating Aadhaar details, and obtaining taxi licenses. Some examples of POI documents include PAN card, passport, voter ID, and marriage certificate. The list of acceptable POI documents may vary depending on the specific purpose and organization. For instance, the UIDAI process accepts a wide range of POI and POA (Proof of Address) documents, including photo ID cards, government ID cards, and certificates issued by Gazetted Officers or Tehsildars. Similarly, the South Indian Bank requires different POI and POA documents for different types of customers, such as individuals, Hindu Undivided Families (HUFs), companies, and trusts.

In summary, a POI document is a document that proves the identity of a person and contains their name and photograph. The specific documents that are accepted as POI may vary depending on the purpose and organization.