For 10 years I've worked used pre-foreclosures to build my business.  I've taken my knowledge and experience using this lead source both as an investor and a realtor and created an online training that covers pretty much every aspect you can imagine.  It says Riverside CA in the location, but it covers the judicial and non-judicial foreclosure process which covers every state.

The link below offers a free 1hr training as a pre-cursor to the Masterclass I also offer, but even though the first hour is free, it's still packed with a lot of great information to learn about pre-foreclosure leads.

Feel free to reach out to me if you have any questions about pre-foreclosures or the course. 

https://www.preforeclosuresmasterclass.com/register?utm_source=bigger_pockets&utm_medium=organic_post&utm_campaign=webinar+

John