The false making of any written instrument, for the purpose of fraud or deceit.

Whoever makes any false document or part of a document, with intent to cause damage or injury to the public or to any person , or to support any claim or title, or to cause any person to part with property, or to enter into any express or implied contract, or with intent to commit fraud or that fraud may be committed, commits forgery. [S. 463 of the Penal Code, 1860]

When a person is to be found guilty for forgery of a document, there must be an original document first, when an original document is substituted by another fabricated document, or if a document is created by a fictitious person and not by a genuine person it may be called a forgery. [S.A. Alim vs. Dr. Golam Nabi & Anr. 3 BLT (HCD) 1]