Mutual Legal Assistance (MLA) is the formal process governments use to ask one another for help in criminal investigations and prosecutions. A request can seek electronic evidence, account records, subscriber data, witness statements, search support, or the preservation of data before it is deleted.
MLA matters in cyber security because many attacks leave evidence in cloud services, messaging platforms, or servers located in another country. Without MLA, investigators may not be able to lawfully obtain logs, emails, or metadata, or they may lose them before a case is built. Defenders and incident responders should understand MLA workflows because they affect how quickly evidence can be preserved, how chain of custody is documented, and whether collected data will be admissible in court. In practice, MLA is often used alongside emergency preservation requests and 24/7 cooperation channels to speed up cross-border cyber investigations.