Dan Wallace has published an interesting story, "Photographing a Forgery", on the website of CSNTM about how his team encountered a forged manuscript written on fine vellum, but only on one side. As the team examined the MS Wallace says, "The scent of a fake was beginning to rise up from the dusty pages of these old vellum leaves." For example, there were no nomina sacra at all.
Eventually Wallace found out that J. Edgar Goodspeed had reported on this forgery already in 1937. It wasn't as good as Archaic Mark (2427), which Goodspeed acquired in that same year, 1937, and which was exposed by Stephen Carlson just a few years aog (although there were early suspicions), and, eventually Margret Mitchell & Co through a more systematic examination. Read that story here.