You may check CBP web site for detail.
^}Dv$\;6 LzEE]i http://www.cbp.gov ~3* ZG .eDxIWW+ft The following is mentioned in U.S. Customs and Border Protection Declaration Form
mXN1b! =E6i1x%j Money And Other Monetary
(`uC"M Lk Instruments
u}@%70A You may bring into or take out of the country, including
c-3Y SrY by mail, as much money as you wish. However, if
}ii]cY it is more than $10,000, you will need to report it to
[w#x5Xsn CBP. Ask the CBP officer for the Currency Reporting
u[6`
Jr~ Form (FinCen 105). The penalties for non-compliance
Is*0?9qU can be severe.
;03*qOYc
“Money” means monetary instruments and includes U.S.
E%J7jA4 or foreign coins currently in circulation, currency, travelers’
{ZBb.$}RC checks in any form, money orders, and negotiable
!z4Hj{A_ instruments or investment securities in bearer form.