Stimulus checks are in the mail, but State Police warn that so are some fakes.  The federal government estimates that over 100 million stimulus checks will be mailed over the next five months.  Criminals have an opportunity to scam some of the most vulnerable members of the community and State Police are alerting people that real stimulus checks have 5 unique security features.  They include a protective ultraviolet pattern, invisible to the naked eye, and microprinted words so small they appear as just a line to the naked eye. When magnified, they become visible.  There is also a watermark, the treasury seal, and security ink that will run and turn red when moisture is applied to the black ink of the seal.