You may check CBP web site for detail.
36Wuc@<H 2(`2 f http://www.cbp.gov 9R.tkc|K `yuD/-j The following is mentioned in U.S. Customs and Border Protection Declaration Form
tEP^w f
jp>FVv3 Money And Other Monetary
1{";u"q Instruments
?7a<V+V: You may bring into or take out of the country, including
mO> [kb"V' by mail, as much money as you wish. However, if
xW"J@OiKL it is more than $10,000, you will need to report it to
A=h`Z^8\B CBP. Ask the CBP officer for the Currency Reporting
Wuc,Cjm9(! Form (FinCen 105). The penalties for non-compliance
:VLuI can be severe.
TvI}yaCu/x “Money” means monetary instruments and includes U.S.
6LvUi|~"< or foreign coins currently in circulation, currency, travelers’
?]h+En5z8 checks in any form, money orders, and negotiable
]p0m6}B instruments or investment securities in bearer form.