A signed 8x10 inch photo, autographed in-person by Sean Penn from the film Casualties of War. Sean Penn is an uncommon signer, making authenticated pieces like this especially desirable. In-Person Signature. Authentication: JSA (James Spence Authentication). Certification Number: CI36082. Collector Note: Genuine Sean Penn autographs are hard to obtain, and film-specific pieces are even more sought after. A strong, display-ready collectible from a powerful performance in a classic war drama.