You may check CBP web site for detail.
Jfo#IRC IDwneFO http://www.cbp.gov "EHwv2Hm> kM@8RAxA The following is mentioned in U.S. Customs and Border Protection Declaration Form
Z\`uI+` [% YCupr# Money And Other Monetary
K]Ed-Tz8QZ Instruments
%'@&j2j> You may bring into or take out of the country, including
d94Lc-kq^ by mail, as much money as you wish. However, if
C#vU'RNpl it is more than $10,000, you will need to report it to
r@k&1*& CBP. Ask the CBP officer for the Currency Reporting
WEWNFTI Form (FinCen 105). The penalties for non-compliance
q[**i[+% can be severe.
%0= |WnF- “Money” means monetary instruments and includes U.S.
M(SH3~ or foreign coins currently in circulation, currency, travelers’
8Cwg
V checks in any form, money orders, and negotiable
c1!h;(& instruments or investment securities in bearer form.