What is demand note 20000?

As an AI language model, I don't have access to specific information about a particular demand note that amounts to 20000. However, a demand note is a type of promissory note, which is a legal document that serves as an IOU between parties, where one party promises to pay a sum of money to the other party at a specific time in the future with or without interest.

A demand note differs from other promissory notes in that the lender can demand payment at any time, rather than waiting for a specific date or term to expire. Demand notes are often used in situations where the borrower cannot immediately make a full payment, and the lender wants to maintain the right to demand payment in case the borrower is able to pay earlier.

If you require any specific information about a demand note of 20000, kindly provide more details for a better understanding.