1. Portrait: The portrait of Benjamin Franklin should be clear, detailed, and well-defined. The counterfeit note may have a blurred, pixelated, or off-center portrait.
2. Paper Quality: Authentic bills are printed on high-quality cotton and linen paper, giving them a crisp and sturdy feel. Counterfeit notes may use lower-quality paper that is thinner or has a rough texture.
3. Serial Numbers: Genuine $100 bills have two serial numbers - one on the front (left) and one on the back (right). The serial numbers should match and should be printed clearly and consistently. Counterfeit notes may have mismatched or poorly printed serial numbers.
4. Treasury Seal: The Treasury Seal should be sharply defined and centered on the bill. The counterfeit note may have an unclear or misplaced seal.
5. Microprinting: Look closely at the small text printed around the portrait and within the borders. This text should be sharp and legible. Counterfeit notes may have blurry or incomplete microprinting.
6. Color-Shifting Ink: The color of the Treasury Seal and the numeral 100 on the front of the bill should shift from green to black when viewed from different angles. Counterfeit notes may lack this color-shifting effect.
7. Security Thread: Hold the bill up to the light to check for a vertical security thread running down the center. The thread should be embedded in the paper and should glow pink when exposed to ultraviolet light. Counterfeit notes may lack the thread or may have a non-fluorescent thread.
8. Magnetic Ink: The serial numbers on the front and back of the bill are printed with magnetic ink. This feature is difficult to replicate and is often missing from counterfeit notes.
9. Watermark: Hold the bill up to the light and look for a faint image of Benjamin Franklin in the blank area to the right of his portrait. The watermark should be visible when held at an angle.
10. Ultraviolet Light: When exposed to ultraviolet light, genuine $100 bills will fluoresce in specific patterns, revealing various design elements. Counterfeit notes may not exhibit these fluorescent properties correctly.
If you suspect a 1950 $100 bill may be counterfeit, compare it with a known genuine bill or consult with a professional for verification.