noun
Polite everyday word for paper money, commonly used in spoken and written Japanese. The honorific prefix お makes it sound natural and respectful.
財布にお札が一枚も入っていない。
There isn't a single bill in my wallet.
お札を崩してもらえますか。
Could you break this bill for me?
Means 'coin'. お札 refers specifically to paper money, while 硬貨 is for coins.
Polite form of 札 (さつ, 'bill, paper money') with the honorific prefix お. The reading さつ is a Sino-Japanese reading of 札.