What do we use to mark all bills $20 and larger?

The use of a counterfeit pen to mark all bills of $20 and larger is essential for detecting counterfeit currency. The counterfeit pen contains a special ink that reacts to the paper composition of authentic bills. When the pen is used on a genuine piece of currency, it generally leaves a mark that indicates the bill is valid. In contrast, most counterfeit bills are made from different materials that will produce a different reaction, often resulting in a mark that suggests the bill is not legitimate.

This practice is a crucial element of cash handling procedures, ensuring that employees can quickly and effectively identify potentially fake currency. Therefore, the counterfeit pen serves as an important tool in maintaining the integrity of financial transactions in the restaurant and retail environment.