How to say "I need a check" in Chinese

The structure is 我 (I) + 要 (want/need) + 发票 (invoice/receipt). 发票 is a noun meaning "official receipt" or "invoice". This is a direct request with no extra particles.

Use this in taxis, restaurants, or shops when you need a receipt for reimbursement or proof of purchase. It's direct and appropriate in these contexts. English speakers might say "I need a receipt", but 发票 specifically refers to an official invoice, which is what you need for business expenses. In casual situations, you might hear 收据 (shōujù) for a simple receipt, but 发票 is the correct term for a formal one.