Article 18 Mutual legal assistance

States Parties shall afford one another the widest measure of mutual legal assistance in investigations, prosecutions and judicial proceedings in relation to the offences covered by this Convention as provided for in article 3 and shall reciprocally extend to one another similar assistance where the requesting State Party has reasonable grounds to suspect that the offence referred to in article 3, paragraph 1a) or b), is transnational in nature, including that victims, witnesses, proceeds, instrumentalities or evidence of such offences are located in the requested State Party and that the offence involves an organized criminal group.

Mutual legal assistance shall be afforded to the fullest extent possible under relevant laws, treaties, agreements and arrangements of the requested State Party with respect to investigations, prosecutions and judicial proceedings in relation to the offences for which a legal person may be held liable in accordance with article 10 of this Convention in the requesting State Party.

Mutual legal assistance to be afforded in accordance with this article may be requested for any of the following purposes:

Without prejudice to domestic law, the competent authorities of a State Party may, without prior request, transmit information relating to criminal matters to a competent authority in another State Party where they believe that such information could assist the authority in undertaking or successfully concluding inquiries and criminal proceedings or could result in a request formulated by the latter State Party pursuant to this Convention.

The transmission of information pursuant to paragraph 4 of this article shall be without prejudice to inquiries and criminal proceedings in the State of the competent authorities providing the information. The competent authorities receiving the information shall comply with a request that said information remain confidential, even temporarily, or with restrictions on its use. However, this shall not prevent the receiving State Party from disclosing in its proceedings information that is exculpatory to an accused person. In such a case, the receiving State Party shall notify the transmitting State Party prior to the disclosure and, if so requested, consult with the transmitting State Party. If, in an exceptional case, advance notice is not possible, the receiving State Party shall inform the transmitting State Party of the disclosure without delay.

The provisions of this article shall not affect the obligations under any other treaty, bilateral or multilateral, that governs or will govern, in whole or in part, mutual legal assistance.

Paragraphs 9 to 29 of this article shall apply to requests made pursuant to this article if the States Parties in question are not bound by a treaty of mutual legal assistance. If those States Parties are bound by such a treaty, the corresponding provisions of that treaty shall apply unless the States Parties agree to apply paragraphs 9 to 29 of this article in lieu thereof. States Parties are strongly encouraged to apply these paragraphs if they facilitate cooperation.

States Parties shall not decline to render mutual legal assistance pursuant to this article on the ground of bank secrecy.

States Parties may decline to render mutual legal assistance pursuant to this article on the ground of absence of dual criminality. However, the requested State Party may, when it deems appropriate, provide assistance, to the extent it decides at its discretion, irrespective of whether the conduct would constitute an offence under the domestic law of the requested State Party.

A person who is being detained or is serving a sentence in the territory of one State Party whose presence in another State Party is requested for purposes of identification, testimony or otherwise providing assistance in obtaining evidence for investigations, prosecutions or judicial proceedings in relation to offences covered by this Convention may be transferred if the following conditions are met:

For the purposes of paragraph 10 of this article:

Unless the State Party from which a person is to be transferred in accordance with paragraphs 10 and 11 of this article so agrees, that person, whatever his or her nationality, shall not be prosecuted, detained, punished or subjected to any other restriction of his or her personal liberty in the territory of the State to which that person is transferred in respect of acts, omissions or convictions prior to his or her departure from the territory of the State from which he or she was transferred.

Each State Party shall designate a central authority that shall have the responsibility and power to receive requests for mutual legal assistance and either to execute them or to transmit them to the competent authorities for execution. Where a State Party has a special region or territory with a separate system of mutual legal assistance, it may designate a distinct central authority that shall have the same function for that region or territory. Central authorities shall ensure the speedy and proper execution or transmission of the requests received. Where the central authority transmits the request to a competent authority for execution, it shall encourage the speedy and proper execution of the request by the competent authority. The Secretary-General of the United Nations shall be notified of the central authority designated for this purpose at the time each State Party deposits its instrument of ratification, acceptance or approval of or accession to this Convention. Requests for mutual legal assistance and any communication related thereto shall be transmitted to the central authorities designated by the States Parties. This requirement shall be without prejudice to the right of a State Party to require that such requests and communications be addressed to it through diplomatic channels and, in urgent circumstances, where the States Parties agree, through the International Criminal Police Organization, if possible.

Requests shall be made in writing or, where possible, by any means capable of producing a written record, in a language acceptable to the requested State Party, under conditions allowing that State Party to establish authenticity. The Secretary-General of the United Nations shall be notified of the language or languages acceptable to each State Party at the time it deposits its instrument of ratification, acceptance or approval of or accession to this Convention. In urgent circumstances and where agreed by the States Parties, requests may be made orally, but shall be confirmed in writing forthwith.

A request for mutual legal assistance shall contain:

The requested State Party may request additional information when it appears necessary for the execution of the request in accordance with its domestic law or when it can facilitate such execution.

A request shall be executed in accordance with the domestic law of the requested State Party and, to the extent not contrary to the domestic law of the requested State Party and where possible, in accordance with the procedures specified in the request.

Wherever possible and consistent with fundamental principles of domestic law, when an individual is in the territory of a State Party and has to be heard as a witness or expert by the judicial authorities of another State Party, the first State Party may, at the request of the other, permit the hearing to take place by video conference if it is not possible or desirable for the individual in question to appear in person in the territory of the requesting State Party. States Parties may agree that the hearing shall be conducted by a judicial authority of the requesting State Party and attended by a judicial authority of the requested State Party.

The requesting State Party shall not transmit or use information or evidence furnished by the requested State Party for investigations, prosecutions or judicial proceedings other than those stated in the request without the prior consent of the requested State Party. Nothing in this paragraph shall prevent the requesting State Party from disclosing in its proceedings information or evidence that is exculpatory to an accused person. In the latter case, the requesting State Party shall notify the requested State Party prior to the disclosure and, if so requested, consult with the requested State Party. If, in an exceptional case, advance notice is not possible, the requesting State Party shall inform the requested State Party of the disclosure without delay.

The requesting State Party may require that the requested State Party keeps confidential the fact and substance of the request, except to the extent necessary to execute the request. If the requested State Party cannot comply with the requirement of confidentiality, it shall promptly inform the requesting State Party.

Mutual legal assistance may be refused:

States Parties may not refuse a request for mutual legal assistance on the sole ground that the offence is also considered to involve fiscal matters.

Reasons shall be given for any refusal of mutual legal assistance.

The requested State Party shall execute the request for mutual legal assistance as soon as possible and shall take as full account as possible of any deadlines suggested by the requesting State Party and for which reasons are given, preferably in the request. The requested State Party shall respond to reasonable requests by the requesting State Party on progress of its handling of the request. The requesting State Party shall promptly inform the requested State Party when the assistance sought is no longer required.

Mutual legal assistance may be postponed by the requested State Party on the ground that it interferes with an ongoing investigation, prosecution or judicial proceeding.

Before refusing a request pursuant to paragraph 21 of this article or postponing its execution pursuant to paragraph 25 of this article, the requested State Party shall consult with the requesting State Party to consider whether assistance may be granted subject to such terms and conditions as it deems necessary. If the requesting State Party accepts assistance subject to those conditions, it shall comply with the conditions.

Without prejudice to the application of paragraph 12 of this article, a witness, expert or other person who, at the request of the requesting State Party, consents to give evidence in a proceeding or to assist in an investigation, prosecution or judicial proceeding in the territory of the requesting State Party shall not be prosecuted, detained, punished or subjected to any other restriction of his or her personal liberty in that territory in respect of acts, omissions or convictions prior to his or her departure from the territory of the requested State Party. Such safe conduct shall cease when the witness, expert or other person having had, for a period of fifteen consecutive days or for any period agreed upon by the States Parties from the date on which he or she has been officially informed that his or her presence is no longer required by the judicial authorities, an opportunity of leaving, has nevertheless remained voluntarily in the territory of the requesting State Party or, having left it, has returned of his or her own free will.

The ordinary costs of executing a request shall be borne by the requested State Party, unless otherwise agreed by the States Parties concerned. If expenses of a substantial or extraordinary nature are or will be required to fulfil the request, the States Parties shall consult to determine the terms and conditions under which the request will be executed, as well as the manner in which the costs shall be borne.

The requested State Party:

States Parties shall consider, as may be necessary, the possibility of concluding bilateral or multilateral agreements or arrangements that would serve the purposes of, give practical effect to or enhance the provisions of this article.