noun
chit
CHIT/tʃɪt/
A short written note serving as a record or proof.
The small chit records an amount owed.

Etymology
The “distinctively marked” ancestor lies behind a word meaning “letter” or “memorandum.” English chit retains that written-note sense, including a brief record used as a voucher or acknowledgment of debt.
In context
A runner would be sent from the trenches with a chit for duckboards, hurdles, barbed wire etc.
More examples
- She kept the chit as proof of payment.
- A small chit recorded the delivery.
- The clerk checked the meal chit before serving lunch.
Forms
chit · chits
Similar words
- voucher
- A voucher authorizes or proves a transaction; a chit is usually a brief informal written record.
- receipt
- A receipt proves payment or delivery; a chit may also record an amount owed.