For decades, judicial evidence relied mainly on documents, witness testimony and expert reports. The expansion of email, instant messaging, social networks, cloud storage and mobile devices has, however, introduced a particularly significant category into legal proceedings: digital evidence.

It may include conversations, emails, photographs, recordings, social-media posts, geolocation data, computer files, activity logs and metadata. These elements can help reconstruct communications, place events within a specific timeframe or demonstrate that a particular action occurred. In practice, their relevance may extend across civil, commercial, employment and criminal disputes.

Their use in court nevertheless raises specific difficulties. The first concerns authenticity. A screenshot may reproduce a genuine conversation, but it may also have been altered, cropped or presented without its proper context. Its evidential value therefore depends not only on what it appears to show, but also on whether its source, integrity and correspondence with the original file can be established.

Preservation presents another challenge. Digital information can be altered easily, disappear after an update or be lost when a device is replaced. The manner in which it is collected and preserved is therefore essential. A forensic extraction, retention of the original device or involvement of a digital expert can substantially reinforce its reliability and reduce the scope for challenge.

Fundamental rights must also be taken into account. Not all digital information may be used lawfully. Data obtained through unauthorised access, an infringement of privacy or the interception of another person’s communications may affect the admissibility of the evidence. The procedural usefulness of an electronic document cannot be assessed independently of the way in which it was obtained.

The development of digital evidence has also required courts to adopt more technical methods of assessment. It is no longer sufficient simply to examine what appears on a screen. In some cases, it is necessary to analyse a file’s traceability, creation date, subsequent modifications, source device or consistency with other records. Metadata, although invisible to the ordinary user, may be decisive in confirming or undermining a particular account of events.

This development does not mean that digital evidence is infallible or that it automatically replaces traditional forms of proof. Its strength often depends on its relationship with the rest of the evidential material. An isolated message may be ambiguous; a complete sequence supported by documents, testimony or technical verification may acquire an entirely different significance.

In an environment in which much of personal and professional life leaves an electronic trace, understanding the nature of this evidence has become increasingly important. Proper identification, preservation and assessment of digital information may mark the difference between a mere suspicion and a fact established to the required legal standard.

Where a matter depends on such material, a rigorous approach can distinguish what is incidental from what is genuinely probative, preserve the relevant information and present it with the technical and legal solidity that judicial proceedings demand.