A Red Notice is a formal, published alert requesting provisional arrest with a view to extradition, subject to Interpol’s compliance review before circulation. A diffusion is less formal—sent directly between member countries through Interpol’s I-24/7 network without centralised vetting. Both carry practical consequences including border detention and asset freezes. However, diffusions are often easier to challenge procedurally since they frequently bypass compliance checks. Approximately 60% of Interpol alerts are diffusions rather than Red Notices, making them a significant but less visible enforcement mechanism.
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