This is some type of scam. Caller ID reads US Postal Svc. It is not a call from the postal service. It is some kind of credit card scam. I usually don't answer calls from people that I don't know. A family member had just gone to the post office and we have a post office box. Thought it might be a legitimate call. I was wrong. Next time I will let it go to voice mail. If is legitimate, they will leave a message.
call received in Portland, OR
no message left
Caller ID : US Postal Service
Interesting attempt to get one to answer the line. But why would the usps be calling from an area code nowhere near?