Things You'll Need
Instructions
Look under the copyright information for the print edition. Some comic books will say something along the lines of "5th print," and will give the dates for all of the previous prints that came before it. Others will simply say which printing it is. If a comic book is from the first printing, however, there will rarely ever be anything that tells which printing it is.
Compare the comic book with one that you know to be real. Generally, a fake print will have small details that differ from the original. For instance, the pricing information might look slightly altered.
Research where and when the comic was originally published. If the information does not match your copy, you have a fake. Also look at the condition of the comic book. If your copy is in mint condition and looks brand-new but says it was printed over 50 years ago, it is likely that you have a fake.
Take the comic book to a professional dealer. Someone who makes a living by dealing with comic books can help you authenticate your book.