It was the bank. Wells Fargo. Without telling us explicitly, they told us the report was sent by fax then launched into why banks do this. I asked why social services had never visited us before when we had called about credit card issues, they said, "Were you 60?" So 60 is the magic number, folks.
My husband was prepared and professional, and all of his many other questions were answered. If they were doing some kind of competency testing, I hope we passed.
Yes, we did call the bank when we first learned of the reporting, and they told us they had not reported it. Perhaps it is as someone here surmised and some person within the chain reported it. My husband is stewing about this now.
CoCheesehead--what are some of these many ways to monitor suspected credit card fraud without calling the bank? I think it is a lot of people's first instinct to err on the side of caution and call the bank whenever they think they may have a credit card issue.