Look closely at the dates and signature. If real it will have faded ink color to brown. if they are black most likely a copy. They have been making copies for many years. You can still buy them as souvenirs in shops.
Thanks Gary
I can't make out the serial number in the photo. If you google the number you can find out if the number is legitimate or one of the many counterfeits.
I will also point out that most Counterfeit Confederate Notes/Bills were printed using Dot Matrix Printers. If you are familiar with this type of printing, then all you need is a good Gem Loupe and inspect the printing on the Note/Bill.