A more thorough explanation:

Falsarius is a word from Law Latin that means a counterfeiter. It refers to someone who makes fake money or documents to deceive others.

• A man was arrested for being a falsarius after he was caught making fake passports.
• The police found a hidden room in the basement where the falsarius was printing counterfeit money.

These examples show how falsarius is used to describe someone who creates fake items with the intention of deceiving others. In both cases, the individuals were caught and arrested for their illegal activities.