Coins 101- Start your Research Here!

Book 4- Detecting Counterfeit, Cleaned & Altered U.S. Coins

- Understand how to detect a counterfeit, altered or cleaned coin
- Know which references/sources are reliable and where to find them

  3.  Detect a counterfeit, beginning with U.S. coins –      Counterfeits-US

 Search results on NGC’s WEBSITE for articles about Counterfeit Coins:;cof=FORID%3a11&q=counterfeit

 “Many counterfeits are identified by  diagnostic flaws such as raised lumps and lines or tool marks. These diagnostics are useful to know regardless of what type of coins you collect.”

4.  Altered Coins, beginning with U.S. coins – Altered-US

 Search results on NGC’s WEBSITE for articles about Altered Coins:;cof=FORID%3a11&q=altered%20coins

5.  Determine if a coin has or should be cleaned or preserved, beginning with U.S. coins – Cleaned-US

 Search results on NGC’s WEBSITE for articles about Cleaned Coins:;cof=FORID%3a11&q=cleaned%20coins