回复：今天莫名其妙收到了1张新的信用卡，请问怎么办？怎么查出事情

If it's a real credit card and not just an offer for you to get one --- Call them and ask for the reason. I once received one and ignored it, and a few weeks later, I found out that someone had stolen my identity, used my birth date and SSN, used a faked drivers license with my name and his photo, applied for a lot of credit cards and borrowed money....