1. Check the Serial Number:
- Examine the serial number printed on the bill. The serial number on a genuine bill should follow a specific format and should be unique.
- Ensure that the letter prefix and suffix match the series year designation (e.g., "A" for 1934).
- The serial numbers should be evenly spaced, with no smudging or alterations.
2. Inspect the Paper Quality:
- Genuine US currency is printed on high-quality cotton-blend paper. Hold the bill up to a light source and check for the presence of embedded red and blue fibers.
- Counterfeit bills may use regular paper or have fibers that are not properly embedded.
3. Look for the Treasury Seal:
- On the right side of the bill, you should find the Treasury Seal. It should be clearly defined, with visible details such as the scales, eagle, and lettering.
4. Examine the Portrait:
- Verify that the portrait on the bill is that of Benjamin Franklin, facing to the left. The engraving should be sharp, and the details should be well-defined.
5. Check the Fine Lines:
- Genuine US currency features fine lines and intricate patterns throughout the design. These lines and patterns should be clear, consistent, and unbroken.
6. Look for Watermarks:
- Hold the bill up to a light source and check for the presence of a faint watermark featuring the portrait of Alexander Hamilton.
7. Inspect the Security Thread:
- Since 1996, US bills have incorporated a security thread. However, the 1934A $100 bill does not have a security thread.
8. Verify the Color-Shifting Ink:
- Although the 1934A $100 bill does not have color-shifting ink, newer bills do. Check for this feature on bills issued after 1996.
9. Examine the Microprinting:
- Genuine US bills have microprinting on various parts of the design. Use a magnifying glass to inspect for tiny letters and numbers.
10. Consult a Professional:
- If you suspect that a bill is counterfeit or have any doubts about its authenticity, consult a professional such as a bank teller, currency expert, or law enforcement official.
Remember that counterfeiting is a crime, and it is important to be vigilant when handling currency. If you are unsure about the legitimacy of a bill, it is best to seek professional advice rather than risk accepting a counterfeit note.