Tennessee Code Title 45. Banks and Financial Institutions § 45-2-903

(a) Where a safe deposit box is made available by a lessor to one (1) or more fiduciaries, the lessor may, except as otherwise expressly provided in the lease or the writings pursuant to which the fiduciaries are acting, allow access thereto to any one (1) or more of the fiduciaries or to any agent authorized in writing by any one (1) or more of the fiduciaries.

(b) The lessee, the lessee's estate or any successor fiduciary is bound by any dealings between the agent and the lessor pursuant to a power granting the agent access to a safe deposit box until the lessor has written notice of revocation of that power.