Yup, I just got a call from American Funds asking for my exact mailing address. I'm in apartments, and they only had the street address, not the number. It was weird though, because I've already been receiving mail from them, so I don't know what's up.
This is indeed American Funds. They called me in reply to an e-mail I had sent about my statement. Another phone number for their customer service is 800-421-0180.