You may check CBP web site for detail.
#LNED)Vg &nK<:^n http://www.cbp.gov Z30A{6} yDh6KUK The following is mentioned in U.S. Customs and Border Protection Declaration Form
*K;~!P tl>7^hH Money And Other Monetary
+H2Qk4XFB Instruments
WY]s |2a You may bring into or take out of the country, including
E(|>Ddv B& by mail, as much money as you wish. However, if
C9;kpqNG#u it is more than $10,000, you will need to report it to
yCo.cd- CBP. Ask the CBP officer for the Currency Reporting
yh=N@Z*zP Form (FinCen 105). The penalties for non-compliance
," ql5Q4 can be severe.
fB,_9K5i “Money” means monetary instruments and includes U.S.
5LMw?P.< or foreign coins currently in circulation, currency, travelers’
*lb<$E]="! checks in any form, money orders, and negotiable
@%SQFu@FJ instruments or investment securities in bearer form.