YSK that when asked for your address, name, phone number or other personal information by a cashier, "No thank you" is a perfectly acceptable answer. Protect your privacy.
from /r/YouShouldKnow
YSK表示，当收银员询问您的地址、姓名、电话号码或其他个人信息时，"不用谢 "是一个完全可以接受的答案。保护您的隐私。