Answer:
Non negotiable Instruments
Explanation:
Non negotiable instruments are documents that guarantees(without changes) the payments of a specific amount of money, whose payer is usually named on the document. Non negotiable instruments may not be transferred from the holder or named party to another.
The non negotiable instrument usrd in this case between sandra and Joshua is a promissory note that states the terms and details of the repay or payback. Normally, a promissory note falls under the negotiable instrument, but because it contains a reference to another document, it then becomes a non negotiable instruments.