Does a promissory note have to be signed by both parties

Epson WorkForce WF-2540 All-in-One Printer C11CC36201 (Google Affiliate Ad) Only the borrower needs to sign a promissory note. A promissory note is essentially a written IOU and it's simply a promise that the borrower is making to repay the lender. The lender need not sign because it will be the lender filing the suit to enforce the promise of the borrower.