Tennessee Code Title 9. Public Finances § 9-23-109

(a) A tax increment agency may enter into a taxpayer agreement relative to a plan area after obtaining a written statement executed by each holder of an existing, previously recorded mortgage or deed of trust on the property securing indebtedness and in which each holder consents to the taxpayer agreement and indicates that the assessment does not constitute an event of default under the existing mortgage or deed of trust.  The obligation to make payments under a taxpayer agreement that guarantee, enhance, or otherwise further secure bonds or lease obligations of the tax increment agency under this section, including taxpayer direct payments, must be treated in the same manner as property taxes for purposes of § 67-5-2101.  Notwithstanding this section to the contrary, a tax increment agency shall not condition approval of a plan on the execution of a taxpayer agreement.

(b) A taxpayer agreement lien:

(d) The taxpayer agreement lien runs with the land, and any taxpayer direct payments not yet due under the terms of the taxpayer agreement must not be accelerated or eliminated by foreclosure of a property tax lien.

(e) A provision of a deed of trust, mortgage, or other agreement between a lienholder and a property owner providing for the acceleration of any payment under the deed of trust, mortgage, or agreement solely as the result of entering into taxpayer agreement is unenforceable.

(f) The tax increment agency that is a party to a taxpayer agreement shall file and record each taxpayer agreement with the register of deeds of the county in which the property is located.  The recording must contain: