[Sniper]

why would you want to do that?

Here's the law in the US... If an individual deposits or withdraws $10,000 or more in cash, the transaction must be reported to the Treasury Department. If you purchase $3,000 or more in money orders or traveler's checks, a report will be filed.

What happens when a bank files a report? The reports, known formally as suspicious activity reports, or SARs, are sent to the Financial Crimes Enforcement Network, or FINCEN. FINCEN is a unit of the U.S. Treasury Department, and is the single largest repository of personal financial information in the United States. The SAR will contain the name, Social Security number, address, occupation, and account number and other details about the subject of the report. Once this report is filed, it sets a number of wheels in motion.

The IRS and other government agencies will begin to compare data on the subject of the SAR with other information they already possess. Did the subject's tax returns justify the amount of the transaction? What other accounts does the subject have, and has he been the focus of law enforcement investigations before? The subject's bank account may be monitored for an extended period of time, and in a worst case, the accounts may be frozen until the individual can prove he is not a criminal.

Its worth noting that the Patriot Act extended the reach of the Bank Secrecy Act extensively to include virtually all businesses. If you make a large financial transaction, big brother is watching.