Glossary
Disclosure
The obligation to provide the defence with relevant material, including material that undermines the prosecution case or assists the defence.
Also called: Discovery.
Why the concept exists
A criminal trial is not a contest between equally resourced parties. The state holds the investigation, the files and the forensic capability, and the accused generally holds none of them. Disclosure exists to stop that asymmetry from deciding outcomes: it obliges the side with the material to surrender the parts that do not help it.
Where it operates
The obligation cuts directly against the natural incentive of the people who built the case, which is why it is enforced from outside — by the court, and by the possibility that proceedings are stopped or a conviction overturned. The United Nations Guidelines on the Role of Prosecutors place it among the duties of an office that acts in the public interest rather than as an advocate for conviction.
Worth knowing
Failures of disclosure are among the most commonly documented causes of wrongful conviction.
How far it travels
Scope and timing differ substantially between systems, as does the consequence of a failure. Adversarial systems tend to frame it as a duty owed by one party to the other; inquisitorial systems tend to place the obligation earlier, on an investigation required to gather exculpatory material in the first place.
Worked examples
Systems this platform has researched. Each example shows how one country actually arranges this — including where it departs from the general pattern.
- Germany
- Germany illustrates the inquisitorial framing: the prosecution service directs the investigation and is required to ascertain exculpatory circumstances as part of it, so the obligation attaches to how the case is built rather than only to what is handed over afterwards.
Where this connects
Roles: Prosecutor, Detective / investigator.
Institutions: Prosecution service.
Sources
United Nations · International organisation · 1966 · link verified 2026-07-23
Authentic treaty text as registered in the UN Treaty Series; registered ex officio 23 March 1976. Supports the fair-trial guarantees of Article 14, including the right to a competent, independent and impartial tribunal established by law, and the presumption of innocence (Art. 14(2)). Binding only on states party to it; does not support claims about states that have not ratified, nor about how any individual state applies it. WAVE 19 ADDITION, read from the same authentic treaty text in the UN Treaty Series PDF, text-extracted locally. Supports Article 14(5) in full: "Everyone convicted of a crime shall have the right to his conviction and sentence being reviewed by a higher tribunal according to law." The qualifier "according to law" is part of the provision and is load-bearing: the right is to review as the law of the state provides, not to appeal without limit or by any chosen route. Supports Article 14(6): where a person has by a FINAL decision been convicted of a criminal offence and the conviction has subsequently been reversed or the person pardoned on the ground that a new or newly discovered fact shows conclusively that there has been a miscarriage of justice, the person who has suffered punishment as a result shall be compensated according to law, unless it is proved that the non-disclosure of the unknown fact in time is wholly or partly attributable to that person. Supports Article 14(3)(g), that no one shall be compelled to testify against himself or to confess guilt, and Article 14(4), that the procedure for juvenile persons shall take account of their age and the desirability of promoting their rehabilitation. WAVE 20 ADDITION. PROVENANCE, stated precisely because this record's url is a different copy: the Article 4 material below was read on 2026-08-26 from OHCHR's official PDF of the Covenant at https://www.ohchr.org/sites/default/files/ccpr.pdf. The United Nations Treaty Series copy at this record's url timed out repeatedly this session and was not re-read, so nothing in this addition rests on it. Article 4 is the derogation clause, and its four cumulative conditions are the point. Supports ICCPR Art. 4(1): “1. In time of public emergency which threatens the life of the nation and the existence of which is officially proclaimed, the States Parties to the present Covenant may take measures derogating from their obligations under the present Covenant to the extent strictly required by the exigencies of the situation, provided that such measures are not inconsistent with their other obligations under international law and do not involve discrimination solely on the ground of race, colour, sex, language, religion or social origin.”. Supports ICCPR Art. 4(2), read with Arts. 6, 7, 8, 11, 15, 16 and 18 as printed in the same document: “2. No derogation from articles 6, 7, 8 (paragraphs 1 and 2), 11, 15, 16 and 18 may be made under this provision.”. Supports ICCPR Art. 4(3): “3. Any State Party to the present Covenant availing itself of the right of derogation shall immediately inform the other States Parties to the present Covenant, through the intermediary of the Secretary-General of the United Nations, of the provisions from which it has derogated and of the reasons by which it was actuated. A further communication shall be made, through the same intermediary, on the date on which it terminates such derogation.”. The Covenant binds States Parties to it. It is NOT evidence of any particular state's domestic law, and no country claim on this platform rests on it. It designates no organ to proclaim an emergency, assigns no role to any national legislature, and creates no civil-protection institution. The Human Rights Committee's interpretation of this article is cited separately and attributed to the Committee.WAVE 21 ADDITION. Read from the same United Nations Treaty Series PDF, text-extracted and searched. Supports Art. 9(1)-(4), and specifically that the Covenant polices ARBITRARINESS rather than closing a list of grounds: “Everyone has the right to liberty and security of person. No one shall be subjected to arbitrary arrest or detention. No one shall be deprived of his liberty except on such grounds and in accordance with such procedure as are established by law”; with 9(2) (informed at the time of arrest of the reasons and promptly of any charges), 9(3) (brought promptly before a judge or other officer authorised by law to exercise judicial power; it shall not be the general rule that persons awaiting trial shall be detained in custody) and 9(4) (entitlement to take proceedings before a court which decides without delay on the lawfulness of the detention). Supports Art. 14(1): “All persons shall be equal before the courts and tribunals”, with the right to a fair and public hearing by a competent, independent and impartial tribunal established by law, the closed grounds on which press and public may be excluded, and the rule that judgment shall be made public except where the interest of juvenile persons otherwise requires or the proceedings concern matrimonial disputes or the guardianship of children. Supports Art. 14(3)(e) (“To examine, or have examined, the witnesses against him and to obtain the attendance and examination of witnesses on his behalf under the same conditions as witnesses against him”), 14(3)(f) (free assistance of an interpreter) and 14(3)(g) (“Not to be compelled to testify against himself or to confess guilt” — note that the Covenant adds the confession limb, which the European Convention text does not contain). Supports Art. 14(5). VERIFIED NEGATIVES from exhaustive search of the Covenant text: “proportion” occurs zero times, “equality of arms” zero times, and “remain silent” zero times. This is treaty text binding states party to it; it is not evidence of any state's domestic law, and the corpus invariant forbidding a treaty from standing in for a country applies to it.
Guidelines on the Role of Prosecutors
United Nations (adopted by the Eighth United Nations Congress on the Prevention of Crime and the Treatment of Offenders, Havana, 27 August – 7 September 1990) · International organisation · 1990 · link verified 2026-07-23
Supports the international standards expected of prosecutors: impartiality, protection of the public interest, respect for human dignity, and the separation of prosecutorial from judicial functions. Non-binding guidance, not a description of any national prosecution service.
Strafprozessordnung (StPO) § 160 — Pflicht zur Sachverhaltsaufklärung (German original text)
Bundesministerium der Justiz / Bundesamt für Justiz (Gesetze im Internet) · Legislation · link verified 2026-07-24
Authoritative German text. Supports § 160(1): once the Staatsanwaltschaft learns of a suspected offence it must investigate the facts in order to decide whether to bring a public charge; and § 160(2): it must investigate exculpatory as well as incriminating circumstances and secure evidence. Supports the allocation of investigative responsibility and the objectivity duty. Does NOT support any description of investigative technique, thresholds, or practice.