Question on how to identify properties that were refinanced

[Stefan Stankovic]

Hello everyone, 

Thanks in advance for any answers to this question. I am currently doing some off-market property identification for an investment firm in Houston, and my coworker said that when he refinanced his home and put a new one under contract, he started getting multiple phone calls a week from individuals trying to buy his home. My question is, how did these people either a) find out he refinanced his home or b) put a new one under contract? Have you ever used either or both of these as a criteria in your search? I looked on REI Source but don't see anything that would help indicate that either of these two things were occurring.

Thanks!