Material support is legal language for assistance that can create sanctions compliance exposure. In practice, it can include money, services, hosting, communications access, infrastructure, technical help, or other aid that benefits a sanctioned person, group, or jurisdiction. The exact meaning depends on the legal regime, but the core idea is that support does not have to be military or obviously criminal to matter.
For cyber security teams and digital intermediaries, the term is important because ordinary business operations can become risky if they touch a restricted party. Payment processing, account recovery, server hosting, or customer support may all need screening, escalation, or refusal. In defense work, understanding material support helps operators build sanctions checks, document decisions, and avoid accidental violations when managing cross-border services.