Counterfeit Penny is an unlockable trinket in The Binding of Isaac.

Picking up a coin has a chance to increase the coin's value by 1.

The chance is based on the coin's worth:
• Penny: 50% chance.
• Double Penny: 75% chance.
• Nickel: 96.88% chance.
• Dime: 99.9% chance.

Can be dropped from Special Shopkeepers, Golden Poop, killing a Beggar, or winning a Shell Game.

This page shows information as of the latest Repentance release.
To see latest up-to date information about this trinket for the new Repentance+ (Online Co-op) DLC, check this page instead.

Play the Shell Game or Hell Game 100 times.

Counterfeit Penny can be found in the following item pools:

The following special synergies and interactions for Counterfeit Penny have been documented.

* Note that not all possible synergies and interactions are listed here.

• Check out the trinket description on the external Isaac Wiki.