I have heard of other people getting tabs like this. These tabs were not LSD. I've heard of people putting 2C-x on a piece of paper with some adhesive, and then just sticking another piece of paper on it, much like yours. DOx isn't quite so finnicky when it comes to putting it on a blotter, i've had DOI on blotters at .875 mgs/blotter.
If it isn't LSD, you will taste it....promptly spit it out if you're not ready for a 24+ hour trip.