What type of evidence is characterized as paper material, including letters and contracts?

Documentary evidence is categorized as paper material, which includes items such as letters, contracts, and official documents. This type of evidence is tangible and can be used to support or refute claims made in legal cases. The significance of documentary evidence lies in its ability to provide written proof of transactions, agreements, or communications. Such documents can contain vital information that can influence the outcome of investigations or legal proceedings.

On the other hand, digital evidence refers to data stored or transmitted in digital form, such as emails or files on a computer. Impression evidence relates to physical impressions left by objects or materials, such as tire treads or shoe prints. Plastic fingerprint evidence pertains to three-dimensional impressions left by fingers, either in soft materials like wax or putty. Each of these types serves different purposes within the context of criminal investigations, but only documentary evidence encompasses the specific category of paper-based materials.