An indenture agreement is a legally binding document or contract that establishes terms and conditions between two or more parties. A contract between an Issuer and a Trustee (normally a commercial bank with trust powers) under which the Issuer issues Bonds and specifies their Maturities.The General Rules and Regulations under the Trust Indenture Act of 1939 are applicable to statements of eligibility on this Form. The Act is designed to insure that he will act on behalf. Indenture refers to a legal and binding agreement, contract, or document between two or more parties. A mortgage indenture is a final agreement between a lender and a borrower that sets the terms and conditions of a loan agreement between them. Chicago Title Maricopa. An indenture is a legal contract that reflects an agreement between two parties. Although the term is most familiarly used to refer to a labor contract. A mortgage indenture is a final agreement between a lender and a borrower that sets the terms and conditions of a loan agreement between them.