Is there any appeal mechanism if the CCF rejects my Preventive Request?

There is no appeal against CCF decisions, which are final and binding on INTERPOL. The only further remedy within INTERPOL is an application for revision under Article 42 of the CCF Statute, which must be filed within six months of discovering a new fact that could have led to a different decision. Remedies outside INTERPOL are limited and highly case-specific, and should be assessed individually.