Technically, an endorser is anyone who signs the back of a financial instrument. In lending, the term is used as functional equivalent of a guarantor. A loan endorser usually signs a guaranty agreement included on the promissory note form, often on the back.
Any person guaranteeing in writing repayment of a loan to the political committee. Shall be reported by name, address, date, amount endorsed, as well as occupation and employer if amount endorsed exceeds $500.