Does it have XXXXX XXXXX on the front of it and "10" on the back?
Please let me know if you think it looks like this:
What you have is called fractional currency or 10 cent note.
Yours could have varied values depending on the year and condition.
Ebay is a very good place to establish value for an item.
Since eBay's bidders are world wide, a more reasonable value can be established, than using your local coin shop.
Depending on your bill value and condition it could be worth $5 to several hundred dollars.
Below is a link to a 10 cent bill that sold on eBay for $107.50
Below is a link to 102 auctions on eBay for fractional currency.
Additional questions? Just ask.