Please sign on the laundry list.

请在洗衣单上签名。

Please sign on the laundry list.

请在洗衣单上署名。

The laundry list is in the drawer.

洗衣单在抽屉里。

Please sign on the laundry list, sir.

请您在送洗衣服清单上签字，先生。

Please sign on the laundry list, madam.

小姐，主须送洗衣服单上签字。