Posted By:
DavidFor this and similar desirable singles, you should obtain some commons from the issue for direct comparison. You should obtain a blacklight to further the comparison (scientific yet easy way to compare cardstocks). It's not a crazy idea for a serious collector to keep a library of singles from various sets to be used for comparison.
Realize that, under direct comparison, a counterfeit will nearly always have one and usually more than one obvious difference from the original (gloss, thickness, fluorescence, other).