noun
order number; ticket number; tracking number
A number assigned to a slip, order, ticket, or shipment for identification and tracking. Common in business, logistics, and customer service contexts.
お問い合わせの際は、伝票番号をお知らせください。
Please provide the tracking number when making an inquiry.
伝票番号で荷物の配送状況を確認できます。
You can check the delivery status of your package using the tracking number.
Compound of 伝票 (slip, voucher) and 番号 (number). The exact historical derivation is straightforward; the word is a modern business term.