International Legal Assistance in Litigation: judicial cooperation, apostilles, letters rogatory, and enforcement of foreign decisions (SOSLEGAL Abogados)

1. Concept and practical value

International legal assistance in the litigation context refers to the set of legal and procedural actions required when a matter crosses borders: serving process on a party abroad, obtaining evidence outside Peru, enforcing interim measures in another country, or recognizing and enforcing in Peru a foreign judgment or an international arbitral award (and vice versa).

In Peru, these actions are typically structured around three pillars: (i) applicable international instruments (treaties and conventions), (ii) the central authority and transmission channel, and (iii) formal requirements (apostille/legalization, translation, signatures, etc.). A common mistake that increases cost and delays is treating cross-border cooperation as a mere “formality” rather than a procedural strategy with its own requirements.

2. SOSLEGAL Abogados’ approach (Litigation Department)

At SOSLEGAL Abogados, the Litigation department expressly includes International Legal Assistance within its service offering and methodology, emphasizing an approach grounded in rigorous analysis, research, and case-specific procedural strategy. This includes technical excellence, tailored strategy, professional ethics, and results-oriented work.1.

3. The Peruvian institutional framework: Central Authority and cooperation channels

For international judicial cooperation—especially in civil/commercial matters—the Ministry of Foreign Affairs (MRE) plays a central role. Through its Judicial Cooperation Office, the MRE acts as Central Authority for certain regional instruments (OAS) and as a diplomatic channel for letters rogatory, while also processing incoming and outgoing cooperation requests.2

An official MRE manual (2025) systematizes the process and clarifies:

• the distinction between letters rogatory and consular requests,
• the need to invoke an applicable treaty or the principle of reciprocity,
• and typical formal requirements (apostille/legalization, translations, forms, etc.).2.

4. Documentary formalities: Apostille and legalization (the starting point)

In practice, a significant part of international assistance depends on documents being valid and usable in the destination country.

4.1 Apostille (Hague Convention of 1961)

Peru is a Party to the Apostille Convention (The Hague, 1961), which entered into force for Peru on 30 September 2010, according to the official HCCH status table.3

4.2 Operational rules in Peru

The MRE apostilles documents issued by Peruvian public authorities, and requires certification chains when applicable. If a translation is needed for the destination country, that translation may also need apostille, depending on how it is issued/certified.4

5. Letters rogatory and taking evidence abroad

5.1 Inter-American Convention on Letters Rogatory (OAS)

For service of process, summons, judicial notices, and—under certain circumstances—taking evidence, a key instrument is the Inter-American Convention on Letters Rogatory (Panama, 1975). The official Spanish text sets out requirements and transmission pathways (including via Central Authority).5

The OAS’ official information on signatures/ratifications also records that the ratification instrument includes a declaration regarding the scope of application.6

5.2 Inter-American Convention on the Taking of Evidence Abroad

Where the objective is primarily evidence (witnesses, expert reports, documents), the Inter-American Convention on the Taking of Evidence Abroad is particularly relevant. Its official Spanish text describes the minimum content of the request and the annexes typically required.7

5.3 Peruvian practice: MRE guidance and reciprocity

The MRE’s official manual (2025) indicates that, as of 16 June 2017, the MRE performs Central Authority functions for several OAS instruments (including letters rogatory and taking evidence abroad), and that cooperation can also proceed under the principle of reciprocity where no treaty applies.2

Litigation value-add: this is where time is won or lost. A well-prepared international request (clear purpose, complete annexes, proper translation, correct format) helps avoid returns, observations, and even nullities due to defective service or evidentiary issues.

6. Recognition and enforcement in Peru of foreign judgments and awards: Exequatur

When a foreign decision already exists (a court judgment or award) and one seeks it to produce effects in Peru, the typical pathway is recognition and enforcement proceedings (exequatur).

6.1 Substantive requirements: Civil Code (Legislative Decree 295)

The Peruvian Civil Code regulates recognition of foreign judgments and sets requirements (including those in Article 2104). This guides feasibility analysis: international jurisdiction of the foreign court, due process guarantees, res judicata/finality, compatibility with public order, and related criteria.8

6.2 Jurisdiction and procedure: Code of Civil Procedure (Consolidated Text)

The Code of Civil Procedure provides the framework for “Recognition of judicial decisions and arbitral awards issued abroad,” including jurisdictional rules (typically before the Civil Chamber of the competent Superior Court, among other points).9

6.3 Judicial guidance (Peruvian Judiciary)

The Judiciary has published a practical guide outlining requirements and stages of exequatur (claim, opposition, hearing, judgment), including documentary requirements (complete judgment, legalization/apostille, official translation, sworn statements, etc.).10

Recommended litigation approach: before filing, audit the entire “evidence package”: quality of service in the foreign proceedings, finality of the decision, compatibility with public order, and documentary coherence (apostille/legalization + translation).

7. International arbitration: enforcement of awards under the New York Convention (1958)

In cross-border commercial disputes, it is common to seek recognition and enforcement of foreign arbitral awards. Globally, the key instrument is the New York Convention (1958). UNCITRAL’s official status page lists State parties (including Peru) and relevant dates.

8. International criminal assistance connected to complex disputes: Interpol alerts and extradition

In certain high-risk matters (economic crimes, transnational conduct, restrictive measures), “international assistance” intersects with Interpol, provisional detentions, and extradition. SOSLEGAL has published blog content explaining Interpol’s role in Peru, red notices, and the general framework of international cooperation and judicial review.

Scope note: these scenarios require especially careful handling of fundamental rights, due process, and institutional coordination.

9. Minimum checklist for an international legal assistance mandate

To start on solid footing, one typically needs:

1. Case map: countries involved, objective (service, evidence, interim relief, enforcement), deadlines, and risk profile.
2. Applicable instrument: OAS treaty / other bilateral treaty / reciprocity.
3. Documents: originals or certified copies; apostille/legalization and translations.
4. Procedural strategy: what is requested, why it is necessary, and how it will be supported (avoid overly broad requests).
5. Follow-up: tracking of dispatch/receipt, curing observations, and coordination with local counsel where necessary.

Conclusion

International Legal Assistance in litigation is not an accessory—it is a discipline that combines procedural technique, international law (public and private), documentary formalities, and strategy. Specialized support—such as SOSLEGAL’s Litigation department approach—helps reduce delays, prevent nullities, and turn cross-border cooperation into an effective tool to win or enforce a case, rather than a bottleneck.1

References

1. SOSLEGAL Abogados – Litigation Department (includes “International Legal Assistance” and the department’s methodology). URL: https://soslegal.com.pe/litigios/ .²
2. Ministry of Foreign Affairs (Peru) – Manual on the scope and procedure for processing Letters Rogatory in civil matters (2025) (Central Authority, legal basis, requirements, distinctions between letters rogatory and consular requests). URL: https://cdn.www.gob.pe/uploads/document/file/1796365/1793278-manual-sobre-los-alcances-al-procedimiento-para-la-tramitacion-cartas-rogatorias-en-materia-civil-14-noviembre-2025.pdf?v=1763144157 . ^{2 3}
3. HCCH – Apostille Convention (1961) status table (Peru: deposit 13 Jan 2010; entry into force 30 Sep 2010). URL: https://www.hcch.net/en/instruments/conventions/status-table/?cid=41 .
4. Gob.pe (MRE) – Apostille and Legalization (official guidance). URL: https://www.gob.pe/37288 .
5. OAS – Inter-American Convention on Letters Rogatory (official Spanish text, PDF). URL: https://oas.org/juridico/spanish/tratados/sp_conv_interame_exhort_carta_rogato.pdf .
6. OAS – Inter-American Convention on Letters Rogatory (signatures/ratifications and notes). URL: https://www.oas.org/juridico/english/sigs/b-36.html .
7. OAS – Inter-American Convention on the Taking of Evidence Abroad (official Spanish text, PDF). URL: https://www.oas.org/juridico/spanish/tratados/sp_conv_interame_recep_prue_extranjero.pdf .
8. MINJUSDH (Gob.pe) – Peruvian Civil Code (Legislative Decree 295), official edition (PDF) (includes foreign-judgment recognition rules and Article 2104). URL: https://cdn.www.gob.pe/uploads/document/file/5700008/5060551-codigo-civil-minjus-bcp_n-3.pdf?v=1705608699 .
9. Congress of Peru (CENDOC) – Consolidated Text of the Code of Civil Procedure (PDF) (recognition of foreign judgments and awards; Art. 837 et seq.). URL: https://www2.congreso.gob.pe/sicr/cendocbib/con4_uibd.nsf/FED22DDBEDCD9AAD05257E680061AE63/%24FILE/CODIGO_PROCESAL_CIVIL.pdf .
10. Peruvian Judiciary – Exequatur: requirements and procedure (user guidance). URL: https://www.pj.gob.pe/wps/wcm/connect/cortesuprema/s_cortes_suprema_home/as_servicios/as_enlaces_de_interes/as_orientacion_juridica_usuario/as_tramites_judiciales/requisitos_procedimientos/reconoc_resol_judiciales_laudos_expedidos_extranjero_exequatur .
11. UNCITRAL – New York Convention (1958) status (includes Peru and dates). URL: https://uncitral.un.org/en/texts/arbitration/conventions/foreign_arbitral_awards/status2 .
12. SOSLEGAL Abogados (Blog) – “A legal overview of Interpol in Peru and alerts and detention of foreigners with a red notice”. URL: https://soslegal.com.pe/una-aproximacion-legal-sobre-la-interpol-en-peru-y-las-alertas-y-detencion-de-extranjeros-con-notificacion-roja/ .