the declaration process begins with the Customs Declaration Form (CBP 6059B). This form requires you to indicate whether you are carrying more than $10,000 in cash or monetary instruments.

In addition to presenting a valid visa and passport, non-immigrant foreign nationals must also complete Form 6059B upon entering the United States. This form will be reviewed by a U.S. Customs ...

No. U.S. citizens and legal residents are normally exempt from paying duty fees for items purchased in Mexico if their combined value is under $800, according to the Customs and Border Protection ...