noun
counterfeit bill; counterfeit note
Refers specifically to fake paper money, such as counterfeit yen or dollar bills.
ATMから偽札が出てきた。
A counterfeit bill came out of the ATM.
noun
forged document
Can refer to any forged paper document, but most commonly used for counterfeit money. The broader sense is less frequent.
警察は偽札や偽造書類を押収した。
The police seized counterfeit bills and forged documents.