Mortgage Sample Buyer to Seller is a document that outlines the terms and conditions of a mortgage loan between a mortgage lender and a borrower. It outlines the loan amount, interest rate, repayment terms, and other important details of the loan. The document is used to protect the interests of both the lender and the borrower. There are two types of Mortgage Sample Buyer to Seller documents: a Commitment Letter and a Mortgage Note. A Commitment Letter is a legal agreement between the lender and borrower that states the terms and conditions of the loan, and is usually issued by the lender. A Mortgage Note is a promissory note signed by the borrower, which details the obligations of the borrower in terms of repaying the loan.