The metadata has wide range of applications in real world. But the importance of metadata in computer forensic is quite large. In this paper we will discuss what kind of information exists on current common document file types and how it can be useful for a computer forensic expert to reach at the guilty person. Also we will list the famous cases in which computer related crime is solved using document metadata information. A brief introduction of current status of cyber law of India is listed in this paper.

Key words: metadata, computer forensics, cyber law, office document, pdf.