You may check CBP web site for detail.
zEjl@Kf ys!O"=OJ http://www.cbp.gov J+CGhk 5%wA"_ The following is mentioned in U.S. Customs and Border Protection Declaration Form
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ry= Money And Other Monetary
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O Instruments
RJ'za1@z;b You may bring into or take out of the country, including
C!_=L?QT^ by mail, as much money as you wish. However, if
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it is more than $10,000, you will need to report it to
`]]m$ CBP. Ask the CBP officer for the Currency Reporting
O-0 5. Form (FinCen 105). The penalties for non-compliance
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uf]wX(*<k “Money” means monetary instruments and includes U.S.
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2iw or foreign coins currently in circulation, currency, travelers’
,1~B7Z d checks in any form, money orders, and negotiable
f2tCB1[D+ instruments or investment securities in bearer form.
