Right to intervene; right to institute a proceeding to quash.

# (b)

Right to institute a proceeding to quash—(1) In general. Under section 7609(b), a person entitled to notice of a summons under section 7609(a) and § 301.7609-2 may institute a proceeding to quash the summons in the United States district court for the district in which the summoned person resides or is found.

(2) Requirements for a proceeding to quash. To institute a proceeding to quash a summons, a person entitled to notice of the summons must, not later than the 20th day following the day the notice of the summons was served on or mailed to such person—

(i) File a petition to quash a summons in the name of the person entitled to notice of the summons in the proper district court;

(ii) Notify the Internal Revenue Service (IRS) by sending a copy of that petition to quash by registered or certified mail to the IRS employee and office designated in the notice of summons to receive the copy; and

(iii) Notify the summoned person by sending by registered or certified mail a copy of the petition to quash to the summoned person.

(3) Failure to give timely notice. If a person entitled to notice of the summons fails to give proper and timely notice to either the summoned person or the IRS in the manner described in this paragraph, that person has failed to institute a proceeding to quash and the district court lacks jurisdiction to hear the proceeding. For example, if the person entitled to notice mails a copy of the petition to the summoned person, but fails to mail a copy of the petition to the designated IRS employee and office, the person entitled to notice has failed to institute a proceeding to quash. Similarly, if the person entitled to notice mails a copy of such petition to the summoned person but, instead of sending a copy of the petition by registered or certified mail to the designated IRS employee and office, the person entitled to notice provides the designated IRS employee and office the petition by some other means, the person entitled to notice has failed to institute a proceeding to quash.

(4) Failure to institute a proceeding to quash. If a person entitled to notice fails to institute a proceeding to quash within 20 days following the day the notice of the summons was served on or mailed to such person, the IRS may examine the summoned records and take summoned testimony following the 23rd day after notice of the summons was served on or mailed to the person entitled to notice.