Refers to a formal written instrument, often a signed or sealed document such as a bond, deed, or written pledge. Used in legal or official contexts.
When concluding a contract, they exchange a written document.
He submitted a written bond as proof of the debt.
give a signed statement; give an IOU
Composed of 一 (one) and 札 (tag, paper, document), literally 'one document'. The exact historical derivation is uncertain, but it has been used to refer to a single formal written instrument.