Rich Dad Poor Dad Question?

[Gary Landon]

In the chapter “The Rich Invent Money”, he gives an example of buying a house for $20,000 and selling it on a note for $60,000. I assume he has a mortgage from a lender for the $20,000. My question is how does the note work with the mortgage?Do the buyers pay him on the note and he pays the lender and who actually owns the property?