How to Tell a Fake Louis Vuitton Belt by Appearance: Pattern Alignment: The pattern on a real Louis Vuitton belt will be even with the monogram centered from end to end. While this seems pretty obvious, it’s the glaring clue that I actually missed when purchasing this belt.You can tell if a Louis Vuitton belt is real or fake by checking the text inside the belt. Fake belts have noticeably thicker inscriptions. 1. LV buckle. 1.1. Monogram belt. Authentic Louis Vuitton Belt: Sharp corners are characteristic of authentic Louis Vuitton belts. The bottom of the “V” maintains sharp corners on authentic belts.