A promissory note need only be signed and does not require an acknowledgement before a notary public to be valid. When to Use a Promissory Note.Step 1 – Download the form. Welcome to ECSI's Electronic Promissory Note site. You will be able to complete, review and even print your promissory note using only your web browser. A promissory note should include the principal amount, interest rate, repayment terms, conditions for default, and signatures of both parties. A North Carolina promissory note template is a document used to establish the agreed-upon terms of a loan agreement between a borrower and a lender. An MPN is a legal document that contains the Borrower's Rights and Responsibilities and Terms and Conditions for repayment. North Carolina promissory notes give an overview of a borrower's legally binding promise to pay back a lender in the state. On the top box- fill in the dollar amount of the loan.