The Vietnamese word "chứng từ" is a noun that translates to "voucher," "receipt," or "document" in English. It refers to any official paper that proves a transaction or record of financial activities. In simple terms, "chứng từ" is a piece of paper that shows you have done something, like spending or receiving money.
While "chứng từ" primarily refers to vouchers or receipts, in broader contexts, it can also imply any documentation that serves as evidence or proof of an action, not just financial.