Holy crap, that blew up. Sorry, I posted this over morning espresso and then went to work and didn't look again until now. jpmattia, I'm just replying to your post, but it really applies to all the replies.
I'll be 100% honest here, and I don't know the finest of the details. I worked through a local realtor I've used for everything I've ever done, a local financial advisor, and my lawyer. User user5994461 is expressing the same fear I had in that I was afraid of doing something illegal. I've always kept a chunk of cash on hand equal to what I would owe just in case someone came after me.
At some point the service provider got confusing. I actually paid two different providers in one month in a panic about missing a payment. You cannot believe the paperwork I got. One of them was like "Uh, we don't know what to do with this," and the other took the money, but then that's when the issue of who owned the loan came up.
So as we were starting to sort out actually who to pay, and who actually was getting the money, that's when I stopped paying. At the time it didn't seem so much like stopping payment but instead of just not paying until we sorted it out.
The actual sale of the house was to a Korean family who wanted to house for their children who were going to go to college in our town. The realtor handled the sale, the lawyer checked everything out, and the only loose end was I accidentally left the gas in my name and bought the students a years worth of gas ($1000).
I do know that after they sale we were still trying to resolve what I owed and to who on the original mortgage. I guess technically that is still going on.
My subject take away from this was, "this is an avalanche of paperwork." We wanted to sell the house. Under the circumstance, we did whatever it took to sell it even if we didn't know who I owed the money to.
Also, up until this event, I didn't have a lawyer, or a realtor, or a financial advisor. When there is six figures, it's a big boys game, and you pay to play.
Edit for typo.