It could have come from the other side. If they listed your address for something (because she didn't want to list their own, or for any number of reasons), th

It could have come from the other side. If they listed your address for something (because she didn't want to list their own, or for any number of reasons), they could possibly determine that you lived together from that. Or some database got mixed up and used some shipping address for something they ordered to your residence as a home address. Having them associate you with them isn't all that weird. What's weird is that they get this information from random sources and use it for verification without verifying it's actually accurate first. That's just bonkers.