How does seller financing down payment work?

[Justin C Huggins]

I have been reading several books about investing over the last couple months.  I have heard a lot of talk in regards to Seller financing down payment, which sounds very attractive since I am looking into apartments mainly.  How does this actually work?  Does the seller have to give you the cash upfront then you turn around and give it to the lender?  Or does the seller pay the lender directly?  Just curious about it, seems like it could be potentially a good option for some very profitable property outside of my price range.