You may check CBP web site for detail.
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. http://www.cbp.gov Z\X'd_1! vnX The following is mentioned in U.S. Customs and Border Protection Declaration Form
toa-Wa{ a7H0!9^h Money And Other Monetary
<*'cf2Q$Av Instruments
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You may bring into or take out of the country, including
_X5_ez^/= by mail, as much money as you wish. However, if
s #:%x# it is more than $10,000, you will need to report it to
OVoO6F] CBP. Ask the CBP officer for the Currency Reporting
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[{Kk Form (FinCen 105). The penalties for non-compliance
!J>A,D"- can be severe.
+ R$?2 “Money” means monetary instruments and includes U.S.
#;9H@:N or foreign coins currently in circulation, currency, travelers’
QHf$f@bjI checks in any form, money orders, and negotiable
"5DJu~ instruments or investment securities in bearer form.