Documents

A document means any matter expressed or described upon any substance by means of letters, figures or marks, or by more than one of those means, intended to be used, or which may be used, for the purpose of recording that matter.
§ A writing is a document
§ Words printed, lithographed or photographed are documents
§ A map or plan is a document
§ An inscription on a metal plate or stone is a document
§ A caricature is a document
Documents are also defined under Section 29 of the Indian Penal Code in similar terms.
§ A photograph may be received in evidence if it is above suspicion. (L Choraria v. State of Maharashtra, 1968)
§ Currency notes are documents (Shyma Charan, 1962, Tripura)
§ Marks made on trees by Forest Rangers are documents (Krishtappa, 1925)
The (1) existence, (2) correctness and (3) contents of documents are to be ascertained.

The Indian Evidence Act