请保留收据以核对你的账单。

Keep your receipt to check against your statement.

将收据粘合成一本特别账簿。

The receipts are gummed into a special book.

随信寄上正式收据，敬请查收。

We now have the pleasure to enclose our formal receipt, which we trust you will find in order.

如不满意，可以凭有效收据全额退款。

If you are not satisfied with your purchase, we will refund it in full provided a valid receipt is presented.

确保你买的每样东西都有收据。

Make sure you get a receipt for everything you buy.