Chain of Custody (Cross-Border)
Definition
The documented record of every person who handled digital evidence from its original collection in a foreign jurisdiction through its transfer, receipt, and presentation in domestic proceedings. A gap in cross-border chain of custody is one of the most common grounds for challenging MLAT-obtained evidence.
- Applies to
- Digital evidence collected in a foreign jurisdiction
- Common transfer route
- MLAT (Mutual Legal Assistance Treaty) request
- Common failure point
- Handoff between foreign and domestic custody
- Typical challenge basis
- Undocumented gap in custody during transfer
Common questions
Why is cross-border custody harder to defend than domestic custody?+
The evidence passes through multiple legal systems and agencies with different documentation standards, and the requesting party often has no direct visibility into how the foreign authority collected or stored the material before transfer.
How can prosecutors reduce the risk of a successful challenge?+
By securing detailed handling records from the foreign authority as part of the MLAT request, verifying hash values on receipt, and documenting every subsequent step domestically so the full custody record is continuous, not just the domestic portion.
Related terms
- Article 29 Preservation Request
- An expedited mechanism under the Budapest Convention allowing a signatory state to ask another signatory to preserve specific computer data for at...
- Budapest Convention
- The Council of Europe Convention on Cybercrime (2001), the first binding international treaty on cyber offences. Requires signatory states to criminalise illegal...
- Central Authority
- The government body designated under an MLAT or domestic law to send and receive formal mutual legal assistance requests. In the US...
- G7 24/7 Network
- An informal around-the-clock contact network originally established by G7 countries and now including additional states, allowing law enforcement to request urgent informal...
- Mutual Legal Assistance Treaty (MLAT)
- A bilateral or multilateral treaty under which signatory states agree to assist each other in gathering evidence for criminal investigations. MLATs define...