Anyone who intentionally passes, attempts to pass, sells, publishes, conceals or brings into the United States any falsely made, forged, counterfeited or altered financial instrument can be charged with counterfeiting. The most commonly charged offenses involve altered United States currency such as $1 dollar bills which are altered to appear as if they are $100 bills. Sentences in these cases are determined by the amount of currency involved. If you are charged with counterfeiting you should immediately contact an experienced criminal defense attorney. Forgery is similar to counterfeiting but it involves the forging of financial instruments such as checks.