Thank you.
Relevant sections:
B. ELEMENTS OF RENUNCIATION
A person wishing to renounce his or her U.S. citizenship must voluntarily and with intent to relinquish U.S. citizenship:
appear in person before a U.S. consular or diplomatic officer,
in a foreign country (normally at a U.S. Embassy or Consulate);
and sign an oath of renunciation
Renunciations that do not meet the conditions described above have no legal effect.
E. TAX & MILITARY OBLIGATIONS /NO ESCAPE FROM PROSECUTION
Persons who wish to renounce U.S. citizenship should be aware of the fact that renunciation of U.S. citizenship may have no effect whatsoever on his or her U.S. tax or military service obligations (contact the Internal Revenue Service or U.S. Selective Service for more information). In addition, the act of renouncing U.S. citizenship does not allow persons to avoid possible prosecution for crimes which they may have committed in the United States, or escape the repayment of financial obligations previously incurred in the United States or incurred as United States citizens abroad.