Counterfeit Penny is a trinket.
- Every time the player picks up a coin pickup of some kind, there is a 50% chance that the player will receive an additional coin.
- In addition to regular drop options for all trinkets, this trinket can be found in golden poop, by killing a beggar, or winning at a shell game beggar.
- Counterfeit Penny can trigger from picking up a coin to heal yourself as Keeper. Normally, a coin that heals the Keeper's coin health will not increase your penny count (Nickels give +4 and Dimes give +9), but if Counterfeit Penny triggers, you will heal and still get the full amount.
- Counterfeit Penny is part of the group of penny-themed trinkets, including the Bloody PennyGives a 50% chance to drop a half heart when money is collected., Burnt PennyGives a 50% chance to drop a bomb when money is collected., Butt PennyIsaac will fart when he picks up a coin., Flat PennyGives a 50% chance of spawning a key upon collecting a penny., Rotten PennySpawns a blue fly every time a coin is picked up. and Swallowed PennyUpon taking damage, Isaac drops a penny..