A mortgage payoff request form is a document that is typically provided by the borrower to the mortgage lender or servicing company to request the full payoff amount for the remaining balance on their mortgage.
A letter of intent is a document outlining the intentions of two or more parties to do business together; it is often non-binding unless the language in the document specifies that the companies are legally bound to the terms.
A letter of intent (also known as an LOI) is often written to initiate a business transaction and help define expectations with customers, partners, and vendors before creating a binding agreement.