26 U.S. Code § 6038D - Information with respect to foreign financial assets
Any individual who, during any taxable year, holds any interest in a specified foreign financial asset shall attach to such person’s return of tax imposed by subtitle A for such taxable year the information described in subsection (c) with respect to each such asset if the aggregate value of all such assets exceeds $50,000 (or such higher dollar amount as the Secretary may prescribe).
If any individual fails to furnish the information described in subsection (c) with respect to any taxable year at the time and in the manner described in subsection (a), such person shall pay a penalty of $10,000.
If any failure described in paragraph (1) continues for more than 90 days after the day on which the Secretary mails notice of such failure to the individual, such individual shall pay a penalty (in addition to the penalties under paragraph (1)) of $10,000 for each 30-day period (or fraction thereof) during which such failure continues after the expiration of such 90-day period. The penalty imposed under this paragraph with respect to any failure shall not exceed $50,000.
To the extent provided by the Secretary in regulations or other guidance, the provisions of this section shall apply to any domestic entity which is formed or availed of for purposes of holding, directly or indirectly, specified foreign financial assets, in the same manner as if such entity were an individual.
No penalty shall be imposed by this section on any failure which is shown to be due to reasonable cause and not due to willful neglect. The fact that a foreign jurisdiction would impose a civil or criminal penalty on the taxpayer (or any other person) for disclosing the required information is not reasonable cause.