How does a Purple Notice differ from a Diffusion, and does the distinction matter for my legal strategy?

A Purple Notice is a formal publication approved by INTERPOL’s General Secretariat and circulated to all 196 member countries through official channels. A Diffusion is a less formal alert sent directly between National Central Bureaus without General Secretariat review, though it uses INTERPOL’s communication network. Diffusions containing methodological intelligence can function similarly to Purple Notices but may lack the same procedural safeguards. Strategically, both can be challenged through the CCF, but Diffusions sometimes evade initial detection. A comprehensive Access Request should specifically demand disclosure of both notices and diffusions mentioning your data.