Highly effective and inexpensive tool for detecting bad bills. Simply make a small mark on U.S. currency. Chemically sensitive ink works instantly. An amber mark passes the test, while a dark brown or black mark fails, meaning the bill is likely counterfeit. Works on all new design U.S. currency (bills series 1959 and later).
Our results are ranked based on relevance to your search criteria to ensure you receive the most pertinent information. We may receive an affiliate commission if you purchase a product via the links on our site, but this does not influence the order or relevance of the results.
We are committed to transparency and aim to help you make informed decisions. If you have any questions about our ranking methodology or sponsorship policies, please refer to our Terms of Service for more details.