Yes, the US Dollar 2006 series is still valid and can be used as legal tender for transactions.
All you have is a regular series 2006 $1 bill with a Santa decal over Washington's portrait. It's worth one dollar.
They were making them in 2006 but they were not suppose to get out. There are rummers that if you turn them in to the bank you will get more money.
Still Standing - TV series - ended on 2006-03-08.
The last series of U.S. $2 notes was printed in September of 2006, Series 2003 A.
It's still worth exactly $10.
There are no known rarities in the 2006 series of $1 or $5 bills despite numerous urban legends.
An Elizabeth II 2006 One Dollar coin could come from one of the many 50 plus Commonwealth countries using the Dollar as their currency. They would still be in circulation, so they are worth One Dollar in whatever country they come from.
central bank of trinidad and tobago series 2006
The 325 series was dropped after 2006. models 2007 and up start with 328 and up
The 2004 date is a series date, which is used for as long as that series is valid. It's not like a coin that gets a new date every year. For example, Series 1976 $2 bills were issued until the mid 1990's, when the Series 1995 notes began. So, no your series 2004 notes don't have any added value.
Million Dollar Listing - 2006 was released on: USA: 16 June 2006
Yes, the stamp is still valid for postage in the US. Just equal or exceed the cost of mailing the item.