Promissory Notes in General

• A promissory note in a mortgage--a loan to buy a house or real estate--provides a legal commitment that the borrowed loan amount will be repaid. This sort of legal agreement also specifies the interest that will be paid on top of the base loan amount, as well the schedule of payment.
  
  

The Supplement Document

• Typically attached to a promissory note, the supplement document, which is titled as such in bold letters at the top, provides a clear notice of the promissory note's obligation when it was accepted. While the promissory note may have the same warnings, the supplement document demonstrates a conscious understanding of the warning with signatures of the involved parties.
  
  

Users of Supplements

• Professional lenders, wary of seeing their loans get turned upside down or dismissed by a court in a default, are using supplements more and more. By doing so, a lender can later show the court that the borrower clearly understood the loan obligation, in his native language and without any coercion.