Whether the loan converts to stock or not, a Promissory Note is usually the primary legal document used to memorialize the obligation of the company to repay the loan from the angel investors.
You can learn more and view a sample Promissory Note by clicking this link.
This article contains general legal information and does not contain legal advice. Rocket Lawyer is not a law firm or a substitute for an attorney or law firm. The law is complex and changes often. For legal advice, please ask a lawyer.