http://www.businessinsider.com/citigroup-warns-customers-it-may-refuse-to-allow-withdrawals-2010-2
Interesting read.
"Effective April 1, 2010, we reserve the right to require (7) days advance notice before permitting a withdrawal from all checking accounts. While we do not currently exercise this right and have not exercised it in the past, we are required by law to notify you of this change," Citigroup said on statements received by customers all over the country.
Interesting read.