Check out the microdot on the numeral "2" of your TropWorld $25 chips. Inside that microdot you will find litterally hundreds of "Paulson" reproduced. I doubt that any counterfeiter could reproduce that microdot. More and more higher denomination A.C. chips are being found with microdots somewhere on the chips. I'm sure that the various uv marking also found are part of the anti-counterfeiting measures the regs speak about.