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Person using WhatsApp on a smartphone to illustrate forensic analysis of WhatsApp messages

Digital forensic analysis of WhatsApp messages

Today, technology is fully integrated into our daily lives, and with it, digital evidence has become a key component in legal proceedings. One of the most frequent scenarios involves the submission of WhatsApp messages as evidence to support or challenge certain facts, which requires verifying their origin, authenticity, and integrity.

It is common for one of the parties to present printed WhatsApp messages as documentary evidence. However, this type of presentation lacks technical guarantees, as such messages can be altered, forwarded, or fabricated. For this reason, a simple printout is not sufficient to prove evidentiary validity, and it is easily challengeable if not accompanied by proper forensic analysis.

Most requested services for WhatsApp messages

  • Origin, authenticity, and integrity: Technical confirmation that the messages have not been altered, verifying whether they were truly sent and received by the involved parties, from which device, on what date, and without any later modifications.
  • Forensic extraction of conversations: Direct retrieval of messages from mobile devices or backups, maintaining the chain of custody.
  • Recovery of deleted messages: Search and reconstruction of deleted or archived messages, even if only partially removed.
  • Multimedia attachment analysis: Technical evaluation of images, audios, or videos shared alongside messages, verifying their authenticity and chronological consistency.

Key court rulings on WhatsApp messages

“The Supreme Court ruling conditions the need for expert analysis on whether the defense contests the authenticity of the messages. In this case, the defense did not challenge the authenticity of the messages either in the provisional conclusions or as a preliminary issue at the oral trial, which means that the prosecution cannot be required to provide expert analysis when there was no such challenge.”

“Expert analysis only makes sense when the authenticity of the messages is disputed. If the defense acknowledges having sent them, that admission allows them to be considered authentic.“

Do not put the judicial assessment of your digital evidence at risk Require an official university degree in Computer Engineering

Spanish Law 12/1986 of 1 April recognises the full professional powers and responsibilities of technical engineers within their respective fields of specialisation and expressly includes the preparation of expert assessments, studies and reports .
In the field of information technology, the Resolution of 31 March 2026 of the General Secretariat for Universities expressly includes, among the competences associated with official university qualifications leading to the profession of Technical Engineer in Information Technology, the knowledge required to carry out measurements, calculations, valuations, appraisals, expert assessments, studies and information technology reports .
Entrusting a digital forensic examination to a person who cannot provide evidence of an official university degree in Computer Engineering may seriously compromise the defence of the case. The opposing party may challenge the expert’s qualifications, the methodology applied and the technical reliability of the conclusions, weakening the evidential value of the expert report and placing at risk digital evidence that may prove decisive in the proceedings.
Given the risk of unqualified professional practice in this field, before commissioning a digital forensic examination, make sure that the professional holds an official university degree in Computer Engineering , has proven experience, is professionally registered and possesses specific knowledge of the subject matter under examination.
Qualifications, experience, registration with officially recognised professional bodies, rather than mere membership of private associations , the methodology applied, the proper preservation of the chain of custody and respect for fundamental rights are essential elements in providing the court with an expert report that is technically rigorous, reliable and defensible before the court .
In our Frequently Asked Questions section, we explain how to verify the official qualifications, professional registration and legal authorisation of a digital forensic expert witness.

Why hire a digital forensic expert from FORENSICTECH ?

At FORENSICTECH , we provide every client with a team of qualified digital forensic experts under the direction of Hossaín Mimón, a registered digital forensic expert witness . Our objective is to provide the proceedings with digital evidence that is technically sound, traceable and understandable to lawyers, judges and courts.
By engaging our services, you benefit from:
  • Digital forensic experts holding an official university degree in Computer Engineering, registered with officially recognised professional bodies and legally authorised to prepare and defend expert reports before the Spanish courts.
  • Experience and specialisation in digital forensics and digital evidence , with each analysis adapted to the specific circumstances and requirements of the proceedings.
  • Forensic tools and specialised software for carrying out rigorous, verifiable and technically reliable analyses.
  • Professional methodology and proper preservation of the chain of custody , essential for maintaining the integrity, traceability and reliability of digital evidence.
  • Clear, well-founded and comprehensible expert reports , with an orderly presentation of the methodology applied, the results obtained and the conclusions reached.
  • The option of professional body certification of the expert report , where appropriate or requested by the client, as verification of the expert’s identity and professional authorisation and of the correct formal presentation of the document.
  • Court testimony and technical assistance at trial , with the ability to explain and defend the conclusions of the expert report before the court.
  • Services throughout Spain , with availability to participate in legal proceedings anywhere in the country.
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