Call from non-existent exchange (9-5-8 is a reserved prefix anywhere in Verizonland, including 212) for an organization that initially identified itself simply as "Bikur Cholim". This literally means "visiting the sick" and is used by probably hundreds of different organizations, some of which may even be legit. When pressed, he further said it  was "Agudas Bikur Cholim" which is also too vague to track down, as there are dozens of organizations calling themselves Agudas This or That.. I asked him for an EIN, and he told me "26-3596799" which doesn't cross anything on the IRS's charitable institutions lookup.

I told him that I couldn't pledge over the phone, but  he should send me an envelope and I'd see what I could put into it. If he's legit, he'll send me one; if he's crooked, he *might* still send me one. We'll see what happens next.