The Secretary finds that the liability for the amount assessed, together with all interest in respect thereof, has been fully satisfied or has become legally unenforceable; or
There is furnished to the Secretary and accepted by him a bond that is conditioned upon the payment of the amount assessed, together with all interest in respect thereof, within the time prescribed by law (including any extension of such time), and that is in accordance with such requirements relating to terms, conditions, and form of the bond and sureties thereon, as may be specified by such regulations.
Subject to such regulations as the Secretary may prescribe, the Secretary may issue a certificate of discharge of any part of the property subject to any lien imposed under this chapter if the Secretary finds that the fair market value of that part of such property remaining subject to the lien is at least double the amount of the unsatisfied liability secured by such lien and the amount of all other liens upon such property which have priority over such lien.
Subject to such regulations as the Secretary may prescribe, the Secretary may issue a certificate of discharge of any part of the property subject to the lien if such part of the property is sold and, pursuant to an agreement with the Secretary, the proceeds of such sale are to be held, as a fund subject to the liens and claims of the United States, in the same manner and with the same priority as such liens and claims had with respect to the discharged property.
Subject to such regulations as the Secretary may prescribe, the Secretary may issue a certificate of discharge of any or all of the property subject to any lien imposed by section 6324 if the Secretary finds that the liability secured by such lien has been fully satisfied or provided for.
If the Secretary determines that, because of confusion of names or otherwise, any person (other than the person against whom the tax was assessed) is or may be injured by the appearance that a notice of lien filed under section 6323 refers to such person, the Secretary may issue a certificate that the lien does not attach to the property of such person.
Notwithstanding any other provision of this subtitle, any lien imposed by this chapter shall attach to any property with respect to which a certificate of discharge has been issued if the person liable for the tax reacquires such property after such certificate has been issued.
If a certificate or notice issued pursuant to this section may not be filed in the office designated by State law in which the notice of lien imposed by section 6321 is filed, such certificate or notice shall be effective if filed in the office of the clerk of the United States district court for the judicial district in which such office is situated.
For provisions relating to bonds, see chapter 73 (sec. 7101 and following).